Year	Measure
1998	1.9
1999	1.9
2000	2.5
2001	2.2
2002	2.7
2003	2.5
2004	2.8
2005	2.9
2006	2.9
2007	3.2
2008	3
2009	2.6
2010	2.7
2011	2.95053