Year	Percent
1996-01-01	73.7026
1997-01-01	70.7177
1998-01-01	70.0444
1999-01-01	76.1344
2000-01-01	75.6090
2001-01-01	83.4488
2002-01-01	82.6732
2003-01-01	88.3289
2004-01-01	87.6133
2005-01-01	88.6682
2006-01-01	90.4104
2007-01-01	91.8493
2008-01-01	90.8806
2009-01-01	90.0946
2010-01-01	88.2903
2011-01-01	87.6378
2012-01-01	88.2404
2013-01-01	88.0488
2014-01-01	88.5543
2015-01-01	86.3101
2016-01-01	87.4624