Year	Measure
1995	4.1
1996	3.54
1997	3.21
1998	3.4
1999	3.6
2000	3.8
2001	3.6
2002	3.2
2003	3.1
2004	3.2
2005	3.5
2006	3.8
2007	4.1
2008	4.6
2009	4.4
2010	4.4
2011	4.20686