Year	Percent
1992	95.89567
1993	95.97726
1994	98.05613
1995	98.11474
1996	96.95348
1997	95.17355
1998	97.88891
1999	98.0236
2000	96.94967
2001	100.05561
2002	97.54262
2003	98.842
2004	96.67604
2005	92.7421
2006	93.97908
2007	94.8676
2008	97.2662
2009	98.66239
2010	98.53107
2011	96.47076
2012	92.81007
2013	94.91296
2014	96.00509
2015	96.34459