Year	Measure
1995	3.44
1996	2.73
1997	2.23
1998	2.2
1999	2.9
2000	3.2
2001	3.8
2002	3.6
2003	3.7
2004	3.8
2005	4
2006	3.9
2007	3.8
2008	3.8
2009	3.7
2010	3.5
2011	3.44667