Year	Percent
1995	15.64
1996	16.44
1997	15.07
1998	19.11
1999	16.91
2000	18.5
2001	18.62
2002	17.67
2003	16.67
2004	17.21
2005	16.95
2006	16.34
2007	15.66
2008	15.06
2009	16.44
2010	17.94