usda logo AIPL RESEARCH REPORT
K2-11 (2-13)

State and national standardized lactation averages by breed for cows calving in

H.D. Norman, T.A. Cooper, and F.A. Ross, Jr.
Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705-2350
301-504-8334 (voice) ~ 301-504-8092 (fax) ~ duane.norman@ars.usda.gov ~ http://aipl.arsusda.gov

Lactation yields are often standardized to provide a reasonably equitable comparison of dairy cows with different lactation characteristics (e.g., calving age, days milked, milking frequency, etc.). This report provides averages of standardized yield for calvings during for each State and the nation by breed, plus includes a few large Mexican herds tested through the U.S. system as well. The data originated from herds enrolled in Dairy Herd Improvement programs. The test-day data used by the Animal Improvement Programs Laboratory to calculate the standardized lactation records were provided by the dairy records processing centers; participation in Dairy Herd Improvement programs and dairy records processing center activity have been summarized also using the same data source.

Only data used in calculation of national genetic evaluations are included in the State and national averages. Thus, records beyond fifth lactation or by cows that lacked either a first-lactation record or valid sire identification were excluded. For other editing requirements that excluded data, see complete evaluation documentation.

Breed yields are different between this report and the herd-average report because this report summarizes standardized lactation yield (yield adjusted to 305 days and twice daily milking and for month of calving in addition to standardization to a mature-age basis). In contrast, the herd-average report is determined from actual herd yields. Herd-averages derived are not restricted to records usable for national genetic evaluations. Herd-averages are impacted by lactation length and dry period. Relative yields among breeds differ between the two reports because of large breed differences in the percentage of usable records and age-parity factors. Herd-average reports tend to be more current (by about 6 months) than standardized yield reports released at the same time.

Lactation records began to be calculated with the best prediction method in 1997 and are standardized for age-parity (lactation number), calving month, previous days open, and times milked per day. Records shorter than 305 days are extended to 305 days as part of the best prediction process. Prior to 1997, lactation records were calculated with the test-interval method. The change in how lactation records were calculated was responsible for some of the yield increases between 1995 and 2000 because predicted yield for low-producing cows is higher with best prediction than with the test-interval method. Numbers of records and averages for yields and component percentages are in Tables 1 through 7 by State for Ayrshires, Brown Swiss, Guernseys, Holsteins, Jerseys, Milking Shorthorns, and Red and Whites, respectively. Component percentages were computed from averages of standardized yields for milk and fat or protein.

Numbers of records and national averages for milk and component yields and component percentages are in Table 8A-F by breed for selected years. Brown Swiss, Holsteins, Jerseys and Milking Shorthorn had more usable lactations (Table 8A) in 2011 than in 2010. Holstein calvings were up 4.1%; Jersey calvings increased by 15.2%. Compared with 2010, milk yield (Table 8B) increased for 6 of the 7 breeds. Ayrshires by 0.1%, Brown Swiss by 0.6%, Holsteins by 0.8%, Jerseys by 2.4%, Milking Shorthorn by 1.0%, and Red and White by 0.4%. Fat percentage (Table 8C) in 2011 showed a few changes from 2010, increasing slightly for Holsteins and Jerseys. Fat yield (Table 8D) in 2011 increased by 7 pounds in Brown Swiss, 14 pounds for Holstein, 23 pounds for Jerseys, and 5 pounds for Milking Shorthorns. Protein percentage (Table 8E) increased by 0.01 to 0.03 percentage units for 6 of the 7 breeds between 2010 and 2011. Since 2010, average protein yield (Table 8F) increased by 9 or 10 pounds for Brown Swiss, Holsteins, Milking Shorthorns, and Red and Whites, and 19 pounds for Jerseys.

Milk, beef, and feed prices, Government programs, and characteristics of herds entering and leaving eligible testing programs affect production averages. Average yields across time reflects changes in management strategies and increasing genetic emphasis on other traits such as health and longevity. Genetic change continues to have a positive effect on yield. Interpretation of trends in lactation averages should be made in view of all the changes affecting profitability.

DHI Lactation Averages for Ayrshire  
Table 1. Ayrshire State and National Standardized Lactation Averages for Cows Calving in 2011 With Records
Used in National Genetic Evaluations.

  Records Milk Fat Protein
State (no.) (lb) (%) (lb) (%) (lb)
Arkansas 16 16,759 3.44 577 3.11 521
California 23 20,368 4.22 859 3.25 663
Colorado 13 18,408 3.69 679 3.03 558
Connecticut 122 18,431 3.88 714 3.11 573
Delaware 2 16,076 3.71 596 3.26 524
Florida 5 16,898 3.48 588 2.95 498
Idaho 2 19,243 3.72 716 3.19 614
Illinois 177 19,658 3.87 760 3.14 618
Indiana 83 16,442 3.91 643 3.16 520
Iowa 629 19,643 3.84 754 3.12 613
Kansas 9 19,768 3.55 703 3.13 618
Kentucky 11 18,294 3.63 664 3.13 573
Louisiana 5 17,232 3.56 614 3.12 537
Maine 114 15,714 3.78 593 3.06 481
Maryland 339 18,827 4.02 758 3.16 594
Massachusetts 24 12,642 3.91 494 3.05 386
Michigan 58 18,963 3.85 730 3.12 591
Minnesota 230 16,198 3.81 618 3.12 505
Missouri 81 15,305 3.78 579 3.15 483
Nebraska 4 20,152 4.05 816 3.19 643
New Hampshire 75 18,450 3.56 658 3.15 581
New Jersey 18 17,488 3.84 672 3.11 545
New Mexico 252 17,792 4.00 712 3.30 587
New York 1,063 18,882 3.83 723 3.10 586
North Carolina 19 20,714 3.81 789 3.10 642
North Dakota 1 20,333 4.04 821 3.30 671
Ohio 402 18,224 3.79 691 3.17 577
Oklahoma 41 17,141 3.71 636 3.23 553
Oregon 24 17,701 3.83 678 3.18 563
Pennsylvania 733 18,650 3.82 712 3.14 586
Rhode Island 29 17,087 3.96 677 3.12 532
South Carolina 8 16,485 3.98 657 3.05 502
South Dakota 2 14,110 4.09 578 3.38 477
Tennessee 16 19,050 3.75 714 3.18 605
Texas 33 18,228 3.73 680 3.23 589
Utah 18 12,950 3.82 495 3.18 412
Vermont 489 17,090 3.85 657 3.09 527
Virginia 45 15,563 3.68 573 3.10 483
Washington 89 18,906 3.97 750 3.18 600
West Virginia 36 15,445 3.56 551 3.31 511
Wisconsin 637 18,519 3.83 709 3.14 581
United States 5,977 18,295 3.84 703 3.14 574 

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DHI Lactation Averages for Brown Swiss  
Table 2. Brown Swiss State and National Standardized Lactation Averages for Cows Calving in 2011 With Records
Used in National Genetic Evaluations.

  Records Milk Fat Protein
State (no.) (lb) (%) (lb) (%) (lb)
Alabama 3 16,686 3.69 616 3.26 544
Arizona 130 22,808 3.91 892 3.25 742
Arkansas 17 21,287 3.73 793 3.22 686
California 400 22,091 3.91 865 3.33 735
Colorado 498 24,020 3.74 899 3.32 799
Connecticut 66 17,887 3.83 686 3.25 581
Delaware 2 20,306 3.90 792 3.20 649
Florida 14 18,995 3.42 650 3.06 581
Georgia 107 17,948 3.94 707 3.28 589
Idaho 241 21,342 3.91 834 3.41 727
Illinois 529 21,563 4.06 875 3.39 731
Indiana 570 22,758 4.05 922 3.30 751
Iowa 1,456 22,138 4.03 891 3.34 739
Kansas 145 21,951 3.97 872 3.38 742
Kentucky 104 19,623 3.78 742 3.30 647
Louisiana 10 17,863 3.70 661 3.27 584
Maine 30 17,168 3.87 665 3.20 550
Maryland 233 20,595 4.00 824 3.33 687
Massachusetts 125 20,644 3.81 787 3.26 674
Michigan 257 23,165 4.05 939 3.32 768
Minnesota 1,677 23,625 4.00 945 3.29 778
Mississippi 6 13,618 3.99 543 3.31 451
Missouri 510 18,076 4.23 764 3.38 610
Nebraska 27 22,649 3.99 903 3.35 758
New Hampshire 83 17,971 4.01 721 3.20 575
New Jersey 17 19,825 4.28 848 3.29 653
New Mexico 17 23,165 3.73 864 3.27 758
New York 1,669 21,247 3.96 840 3.28 697
North Carolina 89 21,231 3.96 842 3.23 686
North Dakota 54 17,875 4.10 733 3.33 595
Ohio 1,473 21,630 3.95 854 3.34 722
Oklahoma 43 17,950 3.52 633 3.20 574
Oregon 280 22,026 3.96 872 3.32 731
Pennsylvania 1,369 22,027 3.95 870 3.28 722
South Carolina 14 18,819 3.93 739 3.27 615
South Dakota 60 21,497 4.25 914 3.45 741
Tennessee 184 19,954 3.29 657 3.26 651
Texas 772 23,944 3.77 901 3.37 808
Utah 115 21,651 4.19 907 3.47 752
Vermont 418 19,499 4.09 797 3.35 654
Virginia 214 22,455 4.02 903 3.23 725
Washington 370 20,510 4.09 838 3.40 697
West Virginia 22 22,282 4.01 894 3.38 754
Wisconsin 3,823 22,608 4.01 907 3.29 743
United States 18,243 21,996 3.97 874 3.31 729 

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DHI Lactation Averages for Guernsey  
Table 3. Guernsey State and National Standardized Lactation Averages for Cows Calving in 2011 With Records
Used in National Genetic Evaluations.

  Records Milk Fat Protein
State (no.) (lb) (%) (lb) (%) (lb)
Arizona 8 19,860 3.64 723 2.84 565
Arkansas 2 15,839 3.99 633 3.33 527
California 255 18,300 4.34 794 3.40 622
Colorado 1 16,085 5.21 838 3.75 603
Connecticut 40 17,152 4.20 720 3.15 540
Florida 3 15,059 3.89 586 2.96 446
Illinois 83 16,403 4.22 693 3.22 528
Indiana 159 16,855 4.34 732 3.34 563
Iowa 566 18,215 4.47 814 3.27 595
Kansas 55 16,979 4.40 748 3.30 560
Kentucky 39 18,938 4.14 783 3.23 611
Maine 45 14,587 4.45 649 3.25 474
Maryland 222 16,885 4.55 769 3.34 564
Massachusetts 47 13,788 4.42 609 3.21 442
Michigan 13 14,173 3.97 562 3.33 472
Minnesota 227 16,941 4.39 744 3.25 550
Missouri 267 15,001 4.31 647 3.27 491
Nebraska 39 15,900 4.58 728 3.40 540
New Hampshire 12 17,873 4.64 829 3.32 594
New Jersey 6 15,555 4.76 740 3.34 519
New Mexico 1 18,827 4.40 829 3.23 608
New York 551 17,510 4.35 761 3.16 554
North Carolina 8 15,889 4.29 682 3.38 538
North Dakota 1 19,424 4.60 894 3.19 620
Ohio 327 17,347 4.34 752 3.29 571
Oklahoma 48 15,374 4.17 641 3.20 492
Oregon 201 16,712 4.25 711 3.22 538
Pennsylvania 708 17,248 4.32 745 3.24 559
Rhode Island 4 17,114 4.38 750 3.21 549
South Carolina 17 11,582 4.07 471 3.15 365
South Dakota 14 10,643 4.03 429 3.31 353
Tennessee 60 16,951 4.01 680 3.30 559
Texas 144 13,842 4.46 618 3.36 465
Vermont 110 13,348 4.59 612 3.28 438
Virginia 108 15,454 4.57 706 3.26 503
Washington 115 17,858 4.54 811 3.32 592
West Virginia 10 13,880 4.23 587 3.31 459
Wisconsin 1,560 18,731 4.53 848 3.28 614
United States 6,076 17,349 4.41 766 3.27 567 

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DHI Lactation Averages for Holstein  
Table 4. Holstein State and National Standardized Lactation Averages for Cows Calving in 2011 With Records
Used in National Genetic Evaluations.

  Records Milk Fat Protein
State (no.) (lb) (%) (lb) (%) (lb)
Alabama 562 19,732 3.46 682 3.02 595
Arizona 14,959 23,962 3.48 833 2.98 714
Arkansas 733 20,542 3.44 707 3.03 622
California 476,323 26,701 3.60 961 3.07 820
Colorado 19,461 26,662 3.64 969 3.12 831
Connecticut 6,860 24,951 3.73 932 3.02 755
Delaware 2,466 25,555 3.71 949 3.03 774
Florida 10,360 23,427 3.69 865 2.94 688
Georgia 8,195 23,656 3.62 856 3.00 709
Idaho 103,751 25,905 3.62 938 3.09 802
Illinois 26,465 25,816 3.66 945 3.05 787
Indiana 21,323 24,925 3.75 934 3.05 761
Iowa 58,153 26,459 3.66 969 3.04 805
Kansas 8,929 24,602 3.73 918 3.10 762
Kentucky 7,130 23,552 3.55 835 3.04 716
Louisiana 1,642 21,201 3.55 753 3.01 638
Maine 7,094 24,722 3.67 908 2.99 739
Maryland 20,026 24,225 3.72 902 3.03 733
Massachusetts 3,052 24,448 3.79 928 3.02 739
Mexico 1,927 28,266 3.06 865 3.18 898
Michigan 83,248 26,502 3.69 979 3.03 803
Minnesota 148,360 25,565 3.73 953 3.04 776
Mississippi 1,933 23,165 3.69 856 3.02 699
Missouri 10,051 22,586 3.67 829 3.05 688
Montana 2,189 26,160 3.61 944 2.94 769
Nebraska 11,265 25,145 3.68 926 3.09 778
Nevada 3,762 27,614 3.67 1013 3.10 856
New Hampshire 6,182 26,161 3.74 977 3.03 793
New Jersey 2,272 24,173 3.67 888 2.99 722
New Mexico 30,874 25,201 3.45 870 3.11 783
New York 217,266 25,675 3.75 963 3.04 781
North Carolina 11,521 25,241 3.78 953 2.96 748
North Dakota 2,638 24,468 3.74 915 3.08 753
Ohio 51,726 25,272 3.63 919 3.02 763
Oklahoma 2,244 22,171 3.58 793 3.08 682
Oregon 18,733 24,363 3.77 919 3.07 747
Pennsylvania 178,945 25,373 3.67 932 3.01 764
Rhode Island 98 24,110 3.74 902 2.98 720
South Carolina 3,077 24,518 3.70 907 3.00 737
South Dakota 15,555 24,716 3.83 946 3.08 762
Tennessee 6,218 22,998 3.74 859 3.00 690
Texas 24,605 24,649 3.65 901 3.10 765
Utah 13,199 24,078 3.75 903 3.07 740
Vermont 28,485 24,971 3.82 953 3.07 766
Virginia 34,441 24,339 3.69 898 2.99 728
Washington 40,396 25,266 3.72 940 3.10 784
West Virginia 1,819 22,733 3.64 826 3.02 687
Wisconsin 352,165 27,138 3.71 1008 3.01 818
Wyoming 417 26,590 3.28 873 3.06 814
United States 2,103,095 25,987 3.67 955 3.04 791 

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DHI Lactation Averages for Jersey  
Table 5. Jersey State and National Standardized Lactation Averages for Cows Calving in 2011 With Records
Used in National Genetic Evaluations.

  Records Milk Fat Protein
State (no.) (lb) (%) (lb) (%) (lb)
Alabama 1,193 14,916 4.69 699 3.66 546
Arizona 8,304 18,219 4.61 840 3.51 639
Arkansas 60 14,296 4.10 586 3.41 487
California 69,593 20,508 4.71 965 3.65 748
Colorado 397 18,296 4.71 863 3.58 654
Connecticut 574 17,134 4.69 804 3.51 601
Delaware 159 19,432 4.82 936 3.51 683
Florida 134 16,042 4.36 700 3.42 548
Georgia 226 14,836 4.25 631 3.34 495
Idaho 8,601 19,171 4.72 905 3.69 707
Illinois 1,725 18,289 4.68 856 3.66 669
Indiana 967 17,401 4.72 821 3.60 626
Iowa 7,309 18,681 4.83 903 3.64 679
Kansas 1,269 17,866 4.77 853 3.66 655
Kentucky 1,073 16,384 4.53 742 3.58 587
Louisiana 65 14,989 4.10 615 3.46 519
Maine 796 17,733 4.64 822 3.48 617
Maryland 1,157 16,563 4.79 793 3.62 600
Massachusetts 523 16,670 4.85 808 3.62 603
Michigan 1,340 16,847 4.76 802 3.60 606
Minnesota 3,862 17,746 4.62 820 3.57 634
Mississippi 712 15,486 4.40 681 3.43 531
Missouri 1,432 15,702 4.52 709 3.60 566
Montana 5 13,293 4.09 543 3.54 471
Nebraska 595 20,115 4.60 926 3.60 724
Nevada 409 17,555 4.63 813 3.61 634
New Hampshire 648 17,489 4.78 836 3.59 628
New Jersey 78 15,773 5.00 789 3.57 563
New Mexico 6,291 17,860 4.37 781 3.59 641
New York 6,294 18,345 4.61 845 3.51 644
North Carolina 2,335 18,639 4.50 838 3.49 651
North Dakota 103 16,081 4.58 736 3.68 591
Ohio 9,043 17,610 4.78 842 3.63 639
Oklahoma 587 15,762 4.40 694 3.57 562
Oregon 11,832 18,255 4.79 874 3.66 668
Pennsylvania 8,975 17,085 4.78 817 3.61 617
Rhode Island 27 16,732 4.64 777 3.61 604
South Carolina 2,209 18,180 4.62 839 3.52 640
South Dakota 1,544 17,469 4.50 786 3.60 629
Tennessee 1,688 16,924 4.72 798 3.56 602
Texas 22,696 20,170 4.67 942 3.62 729
Utah 2,499 17,768 4.72 839 3.66 649
Vermont 3,005 15,900 4.77 759 3.59 571
Virginia 1,420 17,806 4.57 814 3.46 617
Washington 3,373 17,445 4.79 835 3.68 643
West Virginia 429 13,497 4.71 635 3.61 487
Wisconsin 12,288 18,619 4.76 886 3.62 674
United States 209,844 19,004 4.70 893 3.62 688 

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DHI Lactation Averages for Milking Shorthorn  
Table 6. Milking Shorthorn State and National Standardized Lactation Averages for Cows Calving in 2011 With
Records Used in National Genetic Evaluations.

  Records Milk Fat Protein
State (no.) (lb) (%) (lb) (%) (lb)
Arizona 73 13,368 3.69 493 3.07 410
Arkansas 126 20,325 3.63 738 3.15 639
California 228 20,517 3.52 723 3.11 637
Colorado 19 22,426 3.59 804 3.09 693
Connecticut 14 16,306 3.41 556 2.88 470
Idaho 10 23,983 3.45 828 3.14 753
Illinois 57 18,231 3.56 649 3.12 569
Indiana 75 18,877 3.66 691 3.19 602
Iowa 120 19,534 3.59 701 3.05 597
Kansas 16 21,437 3.35 719 3.11 667
Kentucky 5 18,486 3.53 653 3.06 566
Maine 43 17,856 3.62 647 3.05 544
Maryland 49 18,027 3.98 718 3.16 571
Massachusetts 22 17,889 3.45 617 3.01 539
Michigan 34 18,674 3.88 724 3.17 593
Minnesota 221 19,127 3.58 685 3.05 584
Missouri 118 15,873 3.57 567 3.15 500
Nebraska 1 18,717 4.06 759 3.19 597
New Hampshire 83 19,359 3.90 756 3.09 598
New Jersey 7 13,440 3.74 502 3.06 412
New York 128 17,824 3.58 638 3.04 541
North Carolina 3 17,822 3.54 632 3.05 544
North Dakota 3 19,250 4.69 904 3.13 603
Ohio 157 17,476 3.71 648 3.10 541
Oklahoma 154 15,952 3.31 529 3.09 493
Oregon 28 19,041 3.70 704 3.14 599
Pennsylvania 156 18,939 3.70 701 3.10 588
Rhode Island 1 18,520 3.79 701 3.07 569
South Dakota 44 18,343 3.48 639 3.15 577
Tennessee 4 16,546 3.59 595 3.30 547
Texas 302 19,500 3.70 722 3.24 631
Utah 45 13,619 3.79 516 3.18 433
Vermont 72 17,478 3.72 650 3.07 537
Virginia 9 18,744 3.92 735 3.04 569
Washington 492 17,801 3.71 661 3.11 553
West Virginia 1 10,188 3.50 357 3.25 331
Wisconsin 368 18,258 3.74 683 3.08 562
United States 3,288 18,319 3.65 669 3.11 570 

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DHI Lactation Averages for Red & White  
Table 7. Red & White State and National Standardized Lactation Averages for Cows Calving in 2011 With Records
Used in National Genetic Evaluations.

  Records Milk Fat Protein
State (no.) (lb) (%) (lb) (%) (lb)
Arkansas 9 18,457 3.54 652 3.10 572
California 169 24,467 3.58 875 3.10 758
Colorado 3 23,513 3.46 814 3.09 727
Georgia 1 23,681 3.59 850 3.10 734
Idaho 1 27,185 3.77 1024 3.41 926
Illinois 39 25,577 3.67 937 3.03 775
Indiana 1 23,440 4.48 1051 3.24 760
Iowa 48 25,067 3.70 928 3.04 762
Kansas 3 22,898 3.83 877 3.12 715
Kentucky 21 23,192 3.81 884 3.14 727
Maine 2 21,203 3.92 832 2.88 612
Maryland 13 19,567 3.77 737 3.02 592
Michigan 188 23,627 3.80 898 3.09 731
Minnesota 287 23,757 3.77 897 3.04 722
Missouri 1 18,476 3.70 684 3.07 567
New Hampshire 1 23,037 3.75 864 2.94 678
New York 251 22,912 3.66 840 2.98 684
North Carolina 11 19,932 3.77 751 2.94 585
Ohio 74 20,724 3.65 757 3.18 660
Oregon 8 25,683 3.62 930 3.08 791
Pennsylvania 375 22,840 3.77 860 3.05 697
South Carolina 1 23,294 2.91 679 2.72 633
Texas 45 20,646 3.80 784 3.29 680
Vermont 10 20,370 3.67 747 3.03 617
Virginia 66 23,464 3.70 868 3.02 708
Washington 47 19,816 4.03 798 3.18 631
Wisconsin 631 24,311 3.70 900 3.01 731
United States 2,306 23,439 3.72 872 3.05 714 

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DHI Lactation Averages Over Time  
Tables 8A-8F. Summary of National Standardized Lactation Averages
for Cows With Records Used in National Genetic Evaluations.

  Table 8A. Records (no.)
  Calving year
Breed 1980 1990 2000 2005 2006 2007 2008 2009 2010 2011
Ayrshire 13,465 11,576 7,035 5,989 6,332 6,198 6,439 6,242 6,045 5,977
Brown Swiss 17,236 17,717 15,704 16,029 17,439 17,406 17,887 17,765 18,069 18,243
Guernsey 38,364 25,805 9,406 7,248 6,852 6,727 6,386 6,222 6,144 6,076
Holstein 1,109,758 1,720,127 1,624,058 1,650,001 1,720,541 1,793,105 1,875,058 1,935,705 2,020,821 2,103,095
Jersey 63,305 99,416 106,837 128,236 137,578 143,634 154,137 165,184 182,137 209,844
Milking Shorthorn 2,302 2,684 2,407 2,723 3,094 3,056 3,157 3,092 3,091 3,288
Red and White 900 5,588 3,927 2,636 2,665 2,581 2,416 2,355 2,370 2,306 

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  Table 8B. Milk (lb)
  Calving year
Breed 1980 1990 2000 2005 2006 2007 2008 2009 2010 2011
Ayrshire 13,144 14,799 17,389 18,303 18,232 18,220 18,145 18,238 18,275 18,295
Brown Swiss 14,172 16,250 20,300 21,405 21,413 21,533 21,522 21,736 21,857 21,996
Guernsey 11,666 13,297 16,043 17,154 17,394 17,243 17,274 17,269 17,351 17,349
Holstein 17,566 20,178 24,517 25,644 25,674 25,639 25,567 25,635 25,757 25,987
Jersey 11,437 13,407 17,038 18,087 18,159 18,265 18,328 18,315 18,565 19,004
Milking Shorthorn 11,560 14,011 16,548 17,582 17,502 17,461 17,040 17,607 18,137 18,319
Red and White 16,470 18,832 22,845 23,815 23,764 23,637 23,459 23,042 23,342 23,439 

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  Table 8C. Fat (%)
  Calving year
Breed 1980 1990 2000 2005 2006 2007 2008 2009 2010 2011
Ayrshire 3.88 3.85 3.86 3.82 3.83 3.82 3.84 3.85 3.85 3.84
Brown Swiss 4.06 3.98 4.01 4.00 4.00 3.98 3.99 3.98 3.97 3.97
Guernsey 4.60 4.49 4.46 4.42 4.41 4.39 4.39 4.41 4.43 4.41
Holstein 3.61 3.61 3.64 3.65 3.66 3.65 3.65 3.63 3.65 3.67
Jersey 4.84 4.73 4.60 4.62 4.61 4.58 4.58 4.62 4.69 4.70
Milking Shorthorn 3.69 3.58 3.59 3.58 3.63 3.66 3.71 3.65 3.66 3.65
Red and White 3.62 3.67 3.66 3.63 3.69 3.71 3.73 3.70 3.73 3.72 

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  Table 8D. Fat (lb)
  Calving year
Breed 1980 1990 2000 2005 2006 2007 2008 2009 2010 2011
Ayrshire 510 570 671 700 698 696 697 702 704 703
Brown Swiss 576 646 814 856 857 856 858 865 867 874
Guernsey 536 598 716 758 767 757 759 762 769 766
Holstein 633 729 893 936 941 936 934 932 941 955
Jersey 553 634 784 835 838 836 839 847 870 893
Milking Shorthorn 426 502 595 630 636 639 631 642 664 669
Red and White 596 692 837 865 877 878 876 853 871 872 

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  Table 8E. Protein (%)
  Calving year
Breed 1980 1990 2000 2005 2006 2007 2008 2009 2010 2011
Ayrshire 3.16 3.13 3.12 3.13 3.13 3.14 3.13 3.14 3.14
Brown Swiss 3.33 3.31 3.30 3.30 3.30 3.30 3.30 3.29 3.31
Guernsey 3.30 3.31 3.27 3.27 3.27 3.26 3.26 3.26 3.27
Holstein 2.94 3.00 3.01 3.02 3.01 3.01 3.02 3.03 3.04
Jersey 3.60 3.58 3.57 3.58 3.57 3.58 3.59 3.60 3.62
Milking Shorthorn 3.09 3.10 3.09 3.10 3.09 3.09 3.09 3.09 3.11
Red and White 2.95 2.98 2.99 3.00 3.01 3.00 3.02 3.02 3.05 

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  Table 8F. Protein (lb)
  Calving year
Breed 1980 1990 2000 2005 2006 2007 2008 2009 2010 2011
Ayrshire 468 545 571 570 570 569 571 573 574
Brown Swiss 541 672 707 707 710 711 717 719 729
Guernsey 439 531 561 569 563 563 563 565 567
Holstein 592 733 772 776 772 771 775 781 791
Jersey 482 610 646 650 652 656 658 669 688
Milking Shorthorn 433 512 543 540 539 527 544 561 570
Red and White 555 680 711 712 711 703 695 705 714 

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