Year	Percent
1995	11.65
1996	11.83
1997	12.86
1998	13.25
1999	13.34
2000	14.66
2001	15.35
2002	16.05
2003	16.86
2004	17.33
2005	17.23
2006	16.76
2007	16.05
2008	15.84
2009	14.47
2010	9.515