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
11	2011	Japan	324071	368	10388		3.97	3.30	436		webmaster@liaj.or.jp
10	2010	Japan	329994	363	10319	9357	3.99	3.29	432		webmaster@liaj.or.jp
9	2009	Japan	333484	363	10222	9268	4.00	3.30	431		webmaster@liaj.or.jp
8	2008	Japan	335055	359	10009	9187	4.01	3.30	428		webmaster@liaj.or.jp
7	2007	Japan	328004	360	10020	9187	4.02	3.30	426		webmaster@liaj.or.jp
6	2006	Japan	317320	359	10073	9220	4.01	3.32	430		webmaster@liaj.or.jp
5	2005	Japan	313302	361	10088	9171	4.02	3.31	432		webmaster@liaj.or.jp
4	2004	Japan	271367	363	10300	9364	4.02	3.30	434		webmaster@liaj.or.jp
3	2003	Japan	294608	358	9988	9184	4.02	3.31	431		webmaster@liaj.or.jp
2	2002	Japan	300707	356	9822	9079	3.97	3.27	430		webmaster@liaj.or.jp
1	2001	Japan	293186	356	9662	8927	3.95	3.26	429		webmaster@liaj.or.jp