Year	Measure
1995	8.57
1996	8.45
1997	8.28
1998	8.2
1999	7.7
2000	7.2
2001	7.5
2002	6.9
2003	7.5
2004	7.5
2005	7.4
2006	7.4
2007	7.5
2008	7.7
2009	8
2010	8
2011	7.53604