Year	Percent
1995	24.64
1996	21.55
1997	23.32
1998	21.15
1999	20.28
2000	18.99
2001	21.06
2002	17.44
2003	18.77
2004	12.21
2005	12.77
2006	9.479
2007	8.994
2008	8.911
2009	9.232
2010	7.769