Year	Percent
1996-01-01	89.9387
1997-01-01	88.0795
1998-01-01	87.8125
1999-01-01	87.6148
2000-01-01	87.5776
2001-01-01	86.8956
2002-01-01	87.2997
2003-01-01	87.8356
2004-01-01	87.2291
2005-01-01	84.2541
2006-01-01	84.0558
2007-01-01	84.7251
2008-01-01	84.3418
2009-01-01	78.8971
2010-01-01	78.5047
2011-01-01	77.7432
2012-01-01	78.0054
2013-01-01	76.3264
2014-01-01	75.2827
2015-01-01	67.0262
2016-01-01	65.1872