Year	Percent
1996-01-01	63.8944
1997-01-01	77.7082
1998-01-01	80.7909
1999-01-01	76.1843
2000-01-01	78.2801
2001-01-01	88.8722
2002-01-01	78.0645
2003-01-01	78.6282
2004-01-01	68.6410
2005-01-01	62.6761
2006-01-01	53.7785
2007-01-01	48.6886
2008-01-01	49.2864
2009-01-01	59.9993
2010-01-01	58.0025
2011-01-01	59.5139
2012-01-01	58.3886
2013-01-01	53.1513
2014-01-01	53.5271