Year	Percent
1996-01-01	44.8592
1997-01-01	48.9834
1998-01-01	60.2727
1999-01-01	73.3556
2000-01-01	70.3714
2001-01-01	70.7898
2002-01-01	68.9079
2003-01-01	66.1407
2004-01-01	62.0732
2005-01-01	57.5772
2006-01-01	58.8671
2007-01-01	58.4442
2008-01-01	58.7801
2009-01-01	59.2923
2010-01-01	56.6950
2011-01-01	55.5208
2012-01-01	54.2030
2013-01-01	51.2345
2014-01-01	52.3831
2015-01-01	52.3444
2016-01-01	52.3895