Key	Year	Country	Total number of dairy cows	Total number of dairy herds	Average of cows per herd	Average milk production per cow per year (kg)	Percent of fat production per cow per year (%)	Percent of protein production per cow per year (%)	Others	E-mail address of the responsible
12	2009	Canada	978400	13214	74.0	8458	3.85	3.23		slafontaine@valacta.com
11	2008	Canada	988500	13587	72.8	8456	3.84	3.24		slafontaine@valacta.com
10	2007	Canada	988500	14660	67.4	8490	3.80	3.23		slafontaine@valacta.com
9	2006	Canada	1048600	15522	67.6	8375	3.80	3.22
7	2005	Canada	1066400	16224	65.7	8242	3.79	3.22		slafontaine@valacta.com
6	2004	Canada	1056700	16970	62.3	8257	3.72	3.22		slafontaine@valacta.com
5	2003	Canada	1065300	17931	59.4	7647	3.73	3.23		slafontaine@valacta.com
4	2002	Canada	1083900	18673	58.0	7516	3.72	3.25		slafontaine@valacta.com
2	2001	Canada	1083900	19411	55.8	7087	3.72	3.24		brussell@adlic.ca