Year	Percent
1995	5.833
1996	6.063
1997	5.544
1998	5.323
1999	6.266
2000	6.585
2001	7.329
2002	7.535
2003	7.418
2004	7.462
2005	8.127
2006	8.895
2007	8.393
2008	8.622
2009	8.474
2010	9.009