Year	Percent
1995	16.04
1996	18.4
1997	18.72
1998	22.3
1999	24.85
2000	26.27
2001	27.69
2002	26.28
2003	23.67
2004	23.4
2005	23.81
2006	22.98
2007	24.27
2008	23.84
2009	23.73
2010	23.99