Year	Measure
1995	9.55
1996	9.43
1997	9.23
1998	9.4
1999	9.4
2000	9.4
2001	9.4
2002	9.5
2003	9.5
2004	9.6
2005	9.6
2006	9.6
2007	9.4
2008	9.3
2009	9.4
2010	9.3
2011	9.46268