Year	Percent
1992-01-01	90.77760000000000
1993-01-01	86.95720000000000
1994-01-01	87.61670000000000
1995-01-01	88.77799999999999
1996-01-01	89.73740000000000
1997-01-01	95.11270000000000
1998-01-01	99.99990000000000
1999-01-01	99.99990000000000
2000-01-01	99.99990000000000
2001-01-01	99.99990000000000
2002-01-01	99.94770000000000
2003-01-01	99.89820000000000
2004-01-01	99.92000000000000
2005-01-01	99.94510000000000
2006-01-01	99.94900000000000
2007-01-01	99.94880000000000
2008-01-01	99.94280000000000
2009-01-01	99.93890000000000
2010-01-01	99.94430000000000
2011-01-01	99.94750000000000
2012-01-01	99.94410000000000
2013-01-01	99.94020000000000
2014-01-01	99.94520000000000
2015-01-01	99.95220000000000
2016-01-01	99.87000000000000