Year	Percent
1995	95.54982
1996	96.13753
1997	96.28661
1998	96.30785
1999	96.51286
2000	96.60523
2001	95.92903
2002	96.68471
2003	96.45283
2004	96.55012
2005	96.31408
2006	95.96669
2007	96.07048
2008	96.1629
2009	95.77865
2010	96.17892
2011	96.43909
2012	96.34477
2013	96.02806
2014	96.09388
2015	95.84686
2016	95.95268
2017	96.00078