Year	Percent
1995	27.36
1996	27.43
1997	28.19
1998	36.37
1999	43.7
2000	42.88
2001	47.15
2002	39.64
2003	41.88
2004	40.36
2005	44.66
2006	46.1
2007	45.66
2008	45.08
2009	43.67
2010	44.88