Year	Percent
1995	28.77
1996	30.39
1997	33.11
1998	36.34
1999	39.4
2000	47.25
2001	52.49
2002	42.72
2003	41.83
2004	39.56
2005	38.98
2006	36.27
2007	34.72
2008	32.6
2009	46.79
2010	32.78