Year	Measure
1995	9.12
1996	9.05
1997	9.48
1998	9.6
1999	9.8
2000	10
2001	9.9
2002	9.7
2003	9.7
2004	9.7
2005	9.6
2006	9.6
2007	9.4
2008	9
2009	8.9
2010	9.2
2011	9.40393