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
7	2009	UK(England & Wales)	235299	363	9490	8430	4.03	3.29	426		RichardN@nmr.co.uk
6	2008	UK (England & Wales)	253061	364	9410	8310	4.06	3.31	426		RichardN@nmr.co.uk
5	2007	UK (England & Wales)	257695	362	9452	8384	4.03	3.29	414		RichardN@nmr.co.uk
4	2006	UK (England & Wales)	280434	362	9429	8413	4.02	3.27	422		RichardN@nmr.co.uk
3	2005	UK (England & Wales)	288803	357	9350	8398	3.99	3.27	418		RichardN@nmr.co.uk
2	2004	UK (England & Wales)	305133	351	9160	8300	3.96	3.28	414		RichardN@nmr.co.uk
1	2003	UK (England & Wales)	328666			8055	3.86	3.25	415		henryr@nmr.co.uk