Year	Percent
1995	23.58
1996	20.31
1997	20.2
1998	16.82
1999	14.86
2000	16.01
2001	14.69
2002	10.81
2003	8.205
2004	8.564
2005	8.193
2006	7.318
2007	9.22
2008	9.458
2009	5.959
2010	4.506