Year	Measure
1995	2.7
1996	2.96
1997	3.56
1998	4
1999	4.1
2000	3.9
2001	4
2002	4
2003	3.9
2004	3.9
2005	3.7
2006	3.3
2007	3.5
2008	3.5
2009	3.7
2010	3.7
2011	3.77411