Key	Year	Country	Total number of dairy cows	Total number of dairy herds	Average of cows per herd	Average milk production per cow per year (kg)	Percent of fat production per cow per year (%)	Percent of protein production per cow per year (%)	Others	E-mail address of the responsible
3	2012	Northern Ireland	50063	349	143	8970	4.03	3.22		TonyC@nmr.co.uk
2	2011	Northern Ireland	41297	291	142	8810	3.97	3.24		RichardN@nmr.co.uk