Year	Percent
1995	8.411
1996	8.315
1997	6.837
1998	7.3
1999	6.896
2000	6.993
2001	6.824
2002	7.415
2003	7.936
2004	7.948
2005	7.93
2006	8.215
2007	9.107
2008	9.305
2009	9.552