Year	Measure
1995	7.94
1996	6.8
1997	6.05
1998	6.8
1999	6.9
2000	7.4
2001	7.5
2002	7.5
2003	7.4
2004	7.4
2005	7.3
2006	7.3
2007	7
2008	6.9
2009	6.7
2010	7.2
2011	7.21386