Key	Year	Country	Breed	Number of lactations	Length of the lactations (days)	Milk yield per recorded cow (kg)	Milk per cow in 305 days (kg)	Percent of fat content (%)	Percent of protein content (%)	Calving interval (days)	Others	E-mail address of the responsible
52	Average during 2009	USA	Aryshire	5,108	305	6,942 kg/yr	6,942	3.94	3.17		DHI Herd Averages	melvin.tooker@ars.usda.gov
53	Average during 2009	USA	Brown Swiss	13,089		8,323 kg/yr	8,323	4.09	3.39		DHI Herd Averages	melvin.tooker@ars.usda.gov
54	Average during 2009	USA	Guernsey	6,184	305	6,891 kg/yr	6,891	4.56	3.37		DHI Herd Averages	melvin.tooker@ars.usda.gov
55	Average during 2009	USA	Holstein	3,938,546	305	10,403 kg/yr	10,403	3.64	3.06		DHI Herd Averages	melvin.tooker@ars.usda.gov
56	Average during 2009	USA	Jersey	204,826	305	7,419 kg/yr	7,419	4.64	3.61		DHI Herd Averages	melvin.tooker@ars.usda.gov
57	Average during 2009	USA	Milking Shorthorn	1,972	305	6,001 kg/yr	6,001	3.52	3.10		DHI Herd Averages	melvin.tooker@ars.usda.gov
50	Average during 2008	USA	Aryshire	5,622	305	7,027 kg/yr	7,027	3.89	3.18		DHI Herd Averages	inquiry@aipl.arsusda.gov
48	Average during 2008	USA	Brown Swiss	14,353	305	8,281 kg/yr	8,281 kg	4.08	3.39		DHI Herd Averages	inquiry@aipl.arsusda.gov
49	Average during 2008	USA	Guernsey	7,220	305	6,962 kg/yr	6,962	4.52	3.37		DHI Herd Averages	inquiry@aipl.arsusda.gov
46	Average during 2008	USA	Holstein	4,027,514	305	10,336 kg/yr	10,336	3.65	3.07		DHI Herd Averages	inquiry@aipl.arsusda.gov
47	Average during 2008	USA	Jersey	208,251	305	7,451 kg/yr	7,451 kg	4.62	3.60		DHI Herd Averages	inquiry@aipl.arsusda.gov
51	Average during 2008	USA	Milking Shorthorn	2,109	305	5,980 kg/yr	5,980	3.56	3.10		DHI Herd Averages	inquiry@aipl.arsusda.gov
44	Average during 2007	USA	Ayrshire	5,756	305	7,076 kg/yr	7,076	3.91	3.17		DHI Herd averages	inquiry@aipl.arsusda.gov
42	Average during 2007	USA	Brown Swiss	14,798	305	8,198 kg/yr	8,198	4.06	3.39		DHI Herd averages	inquiry@aipl.arsusda.gov
43	Average during 2007	USA	Guernsey	7,652	305	7,019 kg/yr	7,019	4.5	3.36		DHI Herd averages	inquiry@aipl.arsusda.gov
40	Average during 2007	USA	Holstein	3,923,973	305	10,290 kg/yr	10,290	3.65	3.07		DHI Herd averages	inquiry@aipl.arsusda.gov
41	Average during 2007	USA	Jersey	193,745	305	7,334 kg/yr	7,334	4.6	3.59		DHI Herd averages	inquiry@aipl.arsusda.gov
45	Average during 2007	USA	Milking Shorthorn	2,055	305	6,339 kg/yr	6,339	3.54	3.10		DHI Herd averages	inquiry@aipl.arsusda.gov
38	Average during 2006	USA	Ayrshire	5,796	305	7,037 kg/yr	7,037	3.91	3.16		DHI Herd averages	inquiry@aipl.arsusda.gov
36	Average during 2006	USA	Brown Swiss	15,007	305	8,234 kg/yr	8,234	4.06	3.37		DHI Herd averages	inquiry@aipl.arsusda.gov
37	Average during 2006	USA	Guernsey	7,862	305	6,986 kg/yr	6,986	4.52	3.35		DHI Herd averages	inquiry@aipl.arsusda.gov
34	Average during 2006	USA	Holstein	3,906,258	305	10,237 kg/yr	10,237	3.66	3.06		DHI Herd averages	inquiry@aipl.arsusda.gov
35	Average during 2006	USA	Jersey	186,581	305	7,315 kg/yr	7,315	4.61	3.59		DHI Herd averages	inquiry@aipl.arsusda.gov
39	Average during 2006	USA	Milking Shorthorn	2,641	305	6,657 kg/yr	6,657	3.73	3.10		DHI Herd averages	inquiry@aipl.arsusda.gov
32	Average during 2005	USA	Ayrshire	6,283	305	7,087 kg/yr	7,087	3.85	3.15		DHI Herd averages	rlaipl@aipl.arsusda.gov
30	Average during 2005	USA	Brown Swiss	14,164	305	8,131 kg/yr	8,131	4.40	3.37		DHI Herd averages	rlaipl@aipl.arsusda.gov
31	Average during 2005	USA	Guernsey	8,328	305	6,850 kg/yr	6850	4.51	3.37		DHI Herd averages	rlaipl@aipl.arsusda.gov
28	Average during 2005	USA	Holstein	3,824,966	305	10,136 kg/yr	10,136	3.64	3.05		DHI Herd averages	rlaipl@aipl.arsusda.gov
29	Average during 2005	USA	Jersey	174,828	305	7,302 kg/yr	7,302	4.60	3.57		DHI Herd averages	rlaipl@aipl.arsusda.gov
33	Average during 2005	USA	Milking Shorthorn	2,481	305	6,486 kg/yr	6,486	3.64	3.11		DHI Herd averages	rlaipl@aipl.arsusda.gov
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