Year	Percent
1995	31.63
1996	29.89
1997	30.79
1998	32.78
1999	24.35
2000	20.74
2001	21.59
2002	16.2
2003	25.89
2004	27.54
2005	24
2006	18.87
2007	15.21
2008	13.97
2009	13.53
2010	13.17