Year	Percent
1995	29.14
1996	29.66
1997	29.7
1998	34
1999	34.89
2000	33.77
2001	37.44
2002	37.52
2003	50.34
2004	57.79
2005	55.05
2006	56.84
2007	48.2
2008	47.99
2009	53.45
2010	50.85