Year	Percent
1995	15.99
1996	16.26
1997	16.89
1998	16.28
1999	16.38
2000	15.91
2001	15.23
2002	15.2
2003	14.53
2004	14.67
2005	14.62
2006	14.96
2007	14.75
2008	14.61
2009	14.57
2010	14.65