Year	Percent
1995	13.89
1996	13.04
1997	11.54
1998	12.68
1999	13.94
2000	14.88
2001	14.28
2002	14.18
2003	14.02
2004	18.28
2005	18.4
2006	18.06
2007	17.58
2008	17.17
2009	16.66
2010	16.57