Year	Percent
1995	87.04177
1996	86.45589
1997	86.02123
1999	94.14458
2000	94.37033
2001	96.43738
2002	93.55721
2003	97.51145
2004	90.82169
2005	92.79855
2007	86.1663
2008	86.94706
2009	89.1639
2010	92.22919
2011	91.90393
2012	89.48259
2013	93.97203
2014	95.46067
2015	95.17892
2016	93.38124