Year	Measure
1996	3.19
1998	2.3
1999	2.4
2000	2.6
2001	2.3
2002	2.2
2003	2.2
2004	2.4
2005	2.5
2006	2.3
2007	2.1
2008	2
2009	2.2
2010	2.5
2011	2.65022