Year	Percent
1996-01-01	82.0297
1997-01-01	75.1472
1998-01-01	91.9592
1999-01-01	85.3343
2000-01-01	86.9888
2001-01-01	76.7531
2002-01-01	76.7531
2003-01-01	76.7531
2004-01-01	99.5394
2005-01-01	78.8483
2006-01-01	76.0011
2007-01-01	77.3217
2008-01-01	78.3717
2009-01-01	76.1503
2010-01-01	79.1769
2011-01-01	77.8088
2012-01-01	77.0468
2013-01-01	76.6933
2014-01-01	77.3869
2015-01-01	78.0380
2016-01-01	76.1807