Year	Measure
1998	5.3
1999	5.3
2000	5.4
2001	5.4
2002	5.7
2003	4.7
2004	4.1
2005	4.3
2006	4.1
2007	4.5
2008	4.5
2009	4.5
2010	4.4
2011	4.42965