Year	Percent
1995	34.69
1996	37.18
1997	35.18
1998	30.66
1999	33.92
2000	42.5
2001	39.78
2002	30.99
2003	46.84
2004	35.56
2005	41.1
2006	32.14
2007	23.27
2008	21.56
2009	19.72
2010	24.97