Year	Percent
1995	42.97
1996	47.59
1997	52.01
1998	52.61
1999	54.29
2000	53.68
2001	40.08
2002	21.64
2003	33.79
2004	42.75
2005	41.2
2006	33.66
2007	30.09
2008	44.28
2009	23.97
2010	24.07