Year	Percent
1995	3.138
1996	2.838
1997	2.911
1998	3.642
1999	3.05
2000	2.111
2001	2.418
2002	2.435
2003	2.596
2004	2.536
2005	2.406
2006	2.354
2007	2.692
2008	2.616
2009	2.755
2010	2.457