Key	Year	Country	Breed	Number of lactations	Length of the lactations (days)	Milk yield per recorded cow (kg)	Milk per cow in 305 days (kg)	Percent of fat content (%)	Percent of protein content (%)	Calving interval (days)	Others	E-mail address of the responsible
2	2002	Ireland	Holstein Friesian	77,570	280	6739		3.72%	3.31%			acromie@icbf.com
1	2001	Ireland	Holstein Friesian	77,242	270	6638		3.74%	3.21%		Other breeds are numerically so few (less than 5% of all recorded cows), that it was decided to give information only for the Holstein Friesian Herd book.	acromie@Icbf.com