Year	Percent
1995	10.48
1996	10.99
1997	11.34
1998	11.08
1999	11.02
2000	11.36
2001	11.49
2002	11.99
2003	12.69
2004	12.94
2005	13.28
2006	16.15
2007	16.08
2008	16.11
2009	18.37
2010	18.45