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
17	2010	POLAND	2528827	450302	5,61	4841	4,03	3,24		d.radzio@pfhb.pl
16	2009	POLAND	2584749	486470	5,31	4714	4,02	3,23		d.radzio@pfhb.pl
15	2008	POLAND	2696934			4621	3,97	3,23		d.radzio@pfhb.pl
14	2007	POLAND	2677270			4503	3,98	3,22		d.radzio@pfhb.pl
12	2006	POLAND	2635621			4399	3,92	3,01		d.radzio@pfhb.pl
9	2005	Poland	2751670			4147	3,98	3,23		hb@kchz.agro.pl
8	2004	Poland	2769524			4082	3,96	3,23		hb@kchz.agro.pl
5	2003	Poland	2897400			3969	3,899	3,200		hb@kchz.agro.pl
3	2002	Poland	2873200	875400	3,3	3902	3,904	3,190		hb@kchz.agro.pl
2	2001	Poland	3005300			3828	3,905	3,183		hb@kchz.agro.pl