Year	Percent
1995	39.38
1996	37.95
1997	34.72
1998	37.84
1999	50.58
2000	48.74
2001	43.06
2002	36.15
2003	38.39
2004	42.72
2005	45.14
2006	39.29
2007	44.31
2008	40.5
2009	41.35
2010	39.72