Year	Percent
1995	11.22
1996	11.8
1997	11.44
1998	11.71
1999	12.02
2000	12.34
2001	12.73
2002	12.55
2003	14.68
2004	15.63
2005	14.64
2006	14.57
2007	14.67
2008	15.08
2009	15.12
2010	15.12