Year	Measure
1995	4.12
1996	4.86
1997	5.18
1998	5
1999	5.2
2000	5.2
2001	5.3
2002	4.9
2003	4.8
2004	4.8
2005	5
2006	5.2
2007	5.3
2008	5.1
2009	5.1
2010	4.7
2011	4.55545