Table 1.

Descriptive statistics of number of cow-years, number of dead and euthanized cows, and number of herds with and without mortality for 6,898 Swedish dairy herds from September (Sep.) 2002 to August (Aug.) 2010.

Year	Cow-years, no.	Dead and euthanized cows, no.	Herds with mortality, no.	Herds without mortality, no.
Sep. 2002 to Aug. 2003	317,787	16,335	4,967	1,398
Sep. 2003 to Aug. 2004	318,290	17,161	4,876	1,256
Sep. 2004 to Aug. 2005	313,238	18,799	4,783	998
Sep. 2005 to Aug. 2006	307,628	19,146	4,643	818
Sep. 2006 to Aug. 2007	290,535	18,168	4,195	719
Sep. 2007 to Aug. 2008	284,846	17,055	3,871	666
Sep. 2008 to Aug. 2009	278,721	18,233	3,710	500
Sep. 2009 to Aug. 2010	270,285	17,877	3,475	477