Year	Percent
1995	23.92
1996	23.33
1997	22.87
1998	22.96
1999	23.68
2000	24.88
2001	24.94
2002	23.92
2003	24.08
2004	24.39
2005	24.77
2006	26.01
2007	26.39
2008	27.16
2009	25.02
2010	24.78