Year	Percent
1996-01-01	51.4617
1997-01-01	54.6339
1998-01-01	57.8434
1999-01-01	66.4157
2000-01-01	63.8554
2001-01-01	70.7368
2002-01-01	80.8521
2003-01-01	88.7022
2004-01-01	66.4484
2005-01-01	61.5799
2006-01-01	60.9149
2007-01-01	58.7145
2008-01-01	56.8337
2009-01-01	56.0329
2010-01-01	53.1197
2011-01-01	53.7077
2012-01-01	54.2057
2013-01-01	55.1421
2014-01-01	53.1223