Year	Percent
1994	75.55649
1995	86.46362
1996	88.70445
1997	86.25091
1998	83.62965
1999	84.64205
2000	70.68687
2001	68.53404
2002	69.40044
2003	70.85373
2004	68.57284
2005	77.93313
2006	77.97363
2007	76.4504
2008	74.92661
2009	76.27658
2010	74.81634
2011	86.43635