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
9	2009	Czech Republic	305 378	297	7 659	7 813	3,87	3,32	411		bucpav@centrum.cz
8	2008	Czech Republic	313 366	297	7 537	7 689	3,88	3,33	412		bucpav@centrum.cz
7	2007	Czech Republic	323 020	297	7 365	7 513	3,90	3,33	409		bucpav@centrum.cz
6	2006	Czech Republic	334 928	296	7 155	7 318	3,94	3,36	410		bucpav@centrum.cz
5	2005	Czech Republic	338 138	297	6 893	7 032	3,96	3,33	412		bucpav@centrum.cz
4	2004	Czech Republic	346 877	296	6 662	6 813	4,04	3,33	409		bucpav@centrum.cz
3	2003	Czech Republic	364 428	296	6 421	6 567	4,10	3,39	408		bucpav@centrum.cz
2	2002	Czech Republic	378 077	296	6 285	6 428	4,13	3,40	404		bucpav@centrum.cz
1	2001	Czech Republic	391 826	295	6 136	6 291	4,14	3,35	400		bucpav@centrum.cz