Year	Percent
1996-01-01	66.5609
1997-01-01	59.1932
1998-01-01	58.7589
1999-01-01	59.9665
2000-01-01	58.2840
2001-01-01	58.3450
2002-01-01	59.9613
2003-01-01	60.8871
2004-01-01	67.6228
2005-01-01	63.2175
2006-01-01	62.9486
2007-01-01	62.8509
2008-01-01	64.9210
2009-01-01	65.6172
2010-01-01	63.2841
2011-01-01	69.9236
2012-01-01	67.4619
2013-01-01	67.9425
2014-01-01	72.9003
2015-01-01	67.7081
2016-01-01	65.2308