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
9	2008	The Netherlands	1466134	20746	71	7926	4.37	3.50		w.koops@pz.agro.nl
8	2007	The Netherlands	1413166	21313	66	7876	4,38	3,51		w.koops@pz.agro.nl
7	2006	The Netherlands	1419738	22302	64	7790	4.39	3.50	provisonal figures
6	2005	The Netherlands	1433202	23527	61	7568	4.44	3.50		w.koops@pz.agro.nl
4	2004	The Netherlands	1470589	24332	60	7335	4.44	3.48		w.koops@pz.agro.nl
3	2003	The Netherlands	1477800	25004	59	7494	4.43	3.48		w.koops@pz.agro.nl
2	2002	The Netherlands	1485531	26296	56	7187	4.44	3.48		W.Koops@PZ.AGRO.N
1	2001	The Netherlands	1545823	27926	55	7096	4.43	3.46		W.Koops@PZ.AGRO.N