Year	Percent
1996-01-01	66.5471
1997-01-01	65.4225
1998-01-01	65.7699
1999-01-01	63.6535
2000-01-01	73.4093
2001-01-01	77.4540
2002-01-01	76.6561
2003-01-01	77.4726
2004-01-01	68.2891
2005-01-01	68.5041
2006-01-01	66.3746
2007-01-01	66.0962
2008-01-01	67.1613
2009-01-01	63.5292
2010-01-01	64.4003
2011-01-01	63.8828
2012-01-01	61.6148
2013-01-01	60.6258
2014-01-01	59.4434
2015-01-01	60.3879
2016-01-01	60.0796