Year	Percent
2000	94.82696
2001	95.14221
2002	94.91158
2003	91.60785
2004	94.43898
2005	94.1613
2006	94.24143
2007	93.05069
2008	93.8541
2009	93.51516
2010	94.00547
2011	94.10309
2012	93.93825
2013	93.92915
2014	93.30126
2015	93.1969
2016	93.99782
2017	92.29612