Year	Percent
1995	6.574
1996	6.438
1997	6.265
1998	6.093
1999	6.009
2000	6.091
2001	6.693
2002	7.017
2003	7.305
2004	7.504
2005	7.558
2006	7.478
2007	7.645
2008	8.832
2009	9.44
2010	9.189