Year	Percent
1995	10.03
1996	10.08
1997	9.754
1998	9.611
1999	9.438
2000	8.955
2001	9.509
2002	8.738
2003	9.147
2004	7.803
2005	8.138
2006	8.073
2007	8.216
2008	7.842
2009	8.604
2010	8.117