Year	Percent
1995	47.73
1996	50.04
1997	47.15
1998	48.88
1999	50.22
2000	47.26
2001	46.74
2002	48.49
2003	44.11
2004	45.5
2005	37.29
2006	22.33
2007	14.94
2008	15.95
2009	14.11
2010	13.61