Year	Percent
1995	14.26
1996	13.03
1997	14.84
1998	14.68
1999	12.51
2000	14.24
2001	13.81
2002	14.58
2003	17.72
2004	16.65
2005	16.26
2006	15.56
2007	15.01
2008	15.8
2009	18.52
2010	18.82