Year	Percent
1995	13.05
1996	13.43
1997	13.1
1998	13.55
1999	14.29
2000	15.11
2001	14.39
2002	14.68
2003	14.76
2004	15.14
2005	15.3
2006	15.59
2007	15.59
2008	15.24
2009	16.03
2010	16.03