Year	Percent
1995	38.66
1996	43
1997	44.05
1998	44.39
1999	42.63
2000	41.51
2001	41.93
2002	41.93
2003	47.78
2004	43.7
2005	35.71
2006	34.84
2007	34.63
2008	30.62
2009	39.33
2010	39.51