AIPL Inbreeding Coefficients for Holstein Cows
Calculated February, 2006

Birth
Year
Number
of
Cows
Percent
Inbreeding
2006 3044 5.1
2005 544812 5.1
2004 666373 5.0
2003 939958 4.9
2002 1054401 4.8
2001 1026321 4.6
2000 1059467 4.5
1999 1051160 4.4
1998 1040119 4.2
1997 1051271 4.1
1996 1041834 3.9
1995 1096795 3.7
1994 1124105 3.5
1993 1125102 3.2
1992 1142149 3.0
1991 1153954 2.8
1990 1146276 2.5
1989 1118528 2.2
1988 1118804 2.0
1987 1094006 1.8
1986 1053639 1.6
1985 1042427 1.5
1984 1018224 1.3
1983 1025393 1.2
1982 1010916 1.0
1981 978649 0.9
1980 933433 0.8
1979 869981 0.8
1978 800694 0.7
1977 762642 0.7
1976 704721 0.6
1975 642346 0.6
1974 613218 0.5
1973 588527 0.5
1972 565061 0.5
1971 541734 0.4
1970 518111 0.4
1969 496684 0.3
1968 484925 0.3
1967 469778 0.2
1966 448361 0.2
1965 431150 0.2
1964 423704 0.1
1963 412848 0.1
1962 404621 0.0
1961 403309 0.0
1960 388530 0.0

 

Plot of ibc * year