Year	Percent
1993-01-01	99.9051
1994-01-01	99.3311
1995-01-01	99.8999
1996-01-01	99.8575
1997-01-01	99.3546
1998-01-01	98.7021
1999-01-01	98.7021
2000-01-01	98.7021
2001-01-01	97.8562
2002-01-01	97.9225
2003-01-01	98.0297
2004-01-01	98.4032
2005-01-01	98.7065
2006-01-01	99.1296
2007-01-01	99.1560
2008-01-01	99.0978
2009-01-01	99.2110
2010-01-01	99.2274
2011-01-01	99.2770
2012-01-01	98.5632
2013-01-01	97.1019
2014-01-01	96.6235
2015-01-01	96.7853
2016-01-01	96.8478