Key	Year	Country	Number of lactations	Length of the lactations (days)	Milk yield per recorded cow (kg)	Milk per cow in 305 days (kg)	Percent fat content (%)	Percent protein content (%)	Calving interval (days)	Others	E-mail address of the responsible
15	2010	UK (Englank & Wales)	457789	361	9310	8290	4.0	3.28	420		RichardN@nmr.co.uk
14	2009	UK(England & Wales)	482415	361	9090	8100	4.0	3.3	423		RichardN@nmr.co.uk
13	2008	uk (England & Wales)	510110	361	9010	7990	4.03	3.31	423		Richardn@nmr.co.uk
12	2007	UK (England & Wales)	502914	358	9040	8070	3.99	3.33	420		RichardN@nmr.co.uk
11	2006	UK (England & Wales)	532479	355	9010	8090	3.99	3.27	418		RichardN@nmr.co.uk
10	2005	UK (England & Wales)	541870	353	8950	8090	3.96	3.27	414		RichardN@nmr.co.uk
9	2004	UK (England & Wales)	568405	348	8760	7980	3.93	3.28	411		RichardN@nmr.co.uk
3	2003	UK (England & Wales)	683290			7719	3.86	3.27	413		richardn@nmr.co.uk
2	2002	UK (England & Wales)	728170			7524	3.90	3.29	404		richardn@nmr.co.uk
1	2001	UK (England & Wales)	784111			7167	3.92	3.26	400		richardn@nmr.co.uk