Year	Percent
1996-01-01	81.4416
1997-01-01	68.2923
1998-01-01	62.1848
1999-01-01	73.2614
2000-01-01	75.3278
2001-01-01	73.8607
2002-01-01	75.0430
2003-01-01	74.2584
2004-01-01	72.8976
2005-01-01	63.8184
2006-01-01	66.3936
2007-01-01	63.0822
2008-01-01	63.9871
2009-01-01	67.2318
2010-01-01	65.7860
2011-01-01	65.9604
2012-01-01	65.4255
2013-01-01	72.2824
2014-01-01	71.8945
2015-01-01	73.1021
2016-01-01	74.6584