Year	Percent
1995	13.54
1996	12.42
1997	15.52
1998	12.96
1999	12.66
2000	13.86
2001	16.72
2002	19.95
2003	17.39
2004	18.94
2005	13.98
2006	13.93
2007	12.97
2008	15.13
2009	15.13
2010	15.13