Year	Percent
1996-01-01	60.0833
1997-01-01	60.4882
1998-01-01	61.9172
1999-01-01	61.1194
2000-01-01	59.8212
2001-01-01	63.8604
2002-01-01	63.8520
2003-01-01	65.2303
2004-01-01	59.3451
2005-01-01	55.4975
2006-01-01	55.5607
2007-01-01	57.2095
2008-01-01	53.9931
2009-01-01	54.6875
2010-01-01	53.8055
2011-01-01	53.2575
2012-01-01	51.4884
2013-01-01	51.4300
2014-01-01	52.5005
2015-01-01	56.2833
2016-01-01	59.6979