Year	Percent
1995	13.47
1996	13.91
1997	13.86
1998	14.13
1999	13.71
2000	14.34
2001	13.45
2002	11.24
2003	14.64
2004	14.84
2005	15.3
2006	15.78
2007	15.48
2008	11.81
2009	12.25
2010	13.3