Year	Percent
1995	13.34
1996	13.58
1997	14.8
1998	14.63
1999	13.99
2000	14.03
2001	13.98
2002	10.81
2003	14.25
2004	13.44
2005	14.28
2006	14.63
2007	14.43
2008	14.83
2009	14.64
2010	14.64