Year	Percent
1995	90.89
1996	90.67
1997	90.29
1998	90.43
1999	90.48
2000	90.32
2001	89.77
2002	90.47
2003	89.8
2004	89.15
2005	87.31
2006	86.73
2007	85.19
2008	82.55
2009	83.96
2010	83.68