Year	Percent
1996-01-01	68.8031
1997-01-01	64.7452
1998-01-01	69.5714
1999-01-01	69.6132
2000-01-01	62.8111
2001-01-01	70.3880
2002-01-01	69.6553
2003-01-01	70.5842
2004-01-01	67.4421
2005-01-01	67.4865
2006-01-01	67.0046
2007-01-01	69.3621
2008-01-01	68.8508
2009-01-01	73.4947
2010-01-01	73.4863
2011-01-01	73.2056
2012-01-01	71.6688
2013-01-01	68.9452
2014-01-01	69.7095
2015-01-01	90.3793
2016-01-01	85.9055