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
11	2009	Switzerland	707742	38723	18.3	6121	4.09	3.30		info@asrbern.ch
10	2008	Switzerland	726875	39564	18.4	5717	3.97	3.29		info@asrbern.ch
9	2007	Switzerland	708340	40340	17,6	5770	4,00	3,30		info@asrbern.ch
8	2006	Switzerland	705400	41200	17,1	5690	3,99	3,32		ifo@asrbern.ch
7	2005	Switzerland	699182	42042	16,6	5690	3,95	3,31		info@asrbern.ch
6	2004	Switzerland	690997	42890	16,1	5680	3,93	3,26		info@asrbern.ch
3	2003	Switzerland	703432	44234	15,9	5590	3,96	3,26		info@asrbern.ch
2	2002	Switzerland	716027	45559	15,7	5570	3,99	3,26		info@asrbern.ch
1	2001	Switzerland	720034	46862	15,4	5540	3,96	3,26		info@asrbern.ch