Year	Percent
1995	13.98
1996	14.1
1997	15.17
1998	15.7
1999	15.37
2000	15.37
2001	15.15
2002	15.55
2003	16.41
2004	16.25
2005	15.4
2006	16.99
2007	16.12
2008	15.78
2009	14.52
2010	14.34