Year	Measure
1995	5.08
1996	4.98
1997	5.02
1998	5.3
1999	5.6
2000	5.5
2001	5.9
2002	5.6
2003	5.7
2004	5.6
2005	5.9
2006	5.9
2007	5.7
2008	5.7
2009	5.6
2010	5.8
2011	6.13631