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	368102	369	10385	9214	3.96	3.30	438		webmaster@liaj.or.jp
10	2010	Japan	378787	364	10321	9,274	3.98	3.29	433		webmaster@liaj.or.jp
9	2009	Japan	387190	365	10211	9132	4.00	3.30	433		webmaster@liaj.or.jp
8	2008	Japan	391187	361	9996	9152	4.01	3.30	431		webmaster@liaj.or.jp
7	2007	Japan	386860	363	9983	9141	4.01	3.31	433		webmaster@liaj.or.jp
6	2006	Japan	380375	360	10031	9162	4.01	3.32	431		webmaster@liaj.or.jp
5	2005	Japan	379339	363	10041	9104	4.01	3.31	434		webmaster@liaj.or.jp
4	2004	Japan	371240	362	10077	9178	4.02	3.31	433		webmaster@liaj.or.jp
3	2003	Japan	368238	359	9890	9074	4.01	3.31	432		webmaster@liaj.or.jp
2	2002	Japan	369095	358	9762	8995	3.97	3.27	431		webmaster@liaj.or.jp
1	2001	Japan	357625	357	9610	8853	3.95	3.26	430		webmaster@liaj.or.jp