Year	Measure
1995	2.77
1996	2.69
1997	3.05
1998	3.3
1999	3.6
2000	2.8
2001	2.9
2002	2.6
2003	2.5
2004	2.6
2005	2.5
2006	2.5
2007	2.5
2008	2.3
2009	2.4
2010	2.4
2011	2.6443