Year	Measure
1995	4.29
1996	5.02
1997	4.29
1998	4.2
1999	3.8
2000	4
2001	4.2
2002	4.5
2003	4.3
2004	4.5
2005	5
2006	5.1
2007	5.1
2008	5.6
2009	5.5
2010	5.4
2011	5.35639