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
3	2002	Ireland	Holstein >=87%	29,894	318	6,832		3.71%	3.29%			acromie@icbf.com
4	2002	Ireland	Holstein 50-87%	188,522	291	5,997		3.71%	3.33%			acromie@icbf.com
2	2001	Ireland	Holstein Friesian - Non Pedigree	222,506	265 days	5,732		3.69%	3.31%	377 days		acromie@icbf.com
1	2001	Ireland	Holstein Friesian - Pedigree	77,242	270	6,638		3.74%	3.28%	394 days	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