Year	Percent
1995	13.34
1996	13.06
1997	14.15
1998	13.6
1999	13.39
2000	13.77
2001	16.58
2002	16.24
2003	15.9
2004	16.31
2005	16.69
2006	16.64
2007	16.49
2008	16.36
2009	16.67
2010	17.02