Year	Percent
1995	13.86
1996	14.11
1997	13.14
1998	16.53
1999	15.65
2000	11.97
2001	11.87
2002	10.66
2003	10.21
2004	11.39
2005	11.92
2006	13.33
2007	12.79
2008	11.52
2009	11.67
2010	10.71