Year	Percent
1995	11.31
1996	11.49
1997	11.83
1998	11.88
1999	13.55
2000	13.59
2001	14.14
2002	14.45
2003	14.6
2004	14.94
2005	15.63
2006	16.28
2007	16.56
2008	16.71
2009	16.8
2010	16.8