Year	Percent
1993	94.66309
1994	94.65383
1995	93.16254
1996	95.7179
1997	96.41503
1998	100.07119
1999	99.55412
2000	96.17159
2001	94.8504
2002	96.16398
2003	92.65185
2004	91.78143
2005	93.18821
2006	91.71085
2007	91.5907
2008	91.76322
2009	91.70373
2013	89.73341
2014	90.13024
2015	91.27798