Year	Percent
1995	25.85
1996	29.6
1997	27.48
1998	24.05
1999	25.09
2000	30.29
2001	27.35
2002	25.09
2003	23.99
2004	32.44
2005	32.22
2006	30.48
2007	27.01
2008	27.6
2009	26.57
2010	26.51