From: Accuracy of direct genomic breeding values for nationally evaluated traits in US Limousin and Simmental beef cattle
Birth year
Limousin
Simmental
1966 to 1970
5
6
1971 to 1975
7
11
1976 to 1980
28
26
1981 to 1985
109
1986 to 1990
245
57
1991 to 1995
837
96
1996 to 2000
824
180
2001 to 2005
93
736
2006 to 2010
91
1563
Total
2239
2703