Year	Measure
1995	5.28
1996	5.32
1997	5.01
1998	5.3
1999	5.1
2000	4.8
2001	5
2002	4.9
2003	5.2
2004	5
2005	5.1
2006	5
2007	5.1
2008	5.1
2009	4.5
2010	4.4
2011	4.30742