Year	Percent
1996-01-01	68.4141
1997-01-01	66.8786
1998-01-01	55.6862
1999-01-01	61.1040
2000-01-01	58.2286
2001-01-01	59.5554
2002-01-01	58.5892
2003-01-01	68.5463
2004-01-01	70.4967
2005-01-01	65.4320
2006-01-01	67.9611
2007-01-01	61.7431
2008-01-01	57.6891
2009-01-01	81.3726
2010-01-01	71.9160
2011-01-01	69.6583
2012-01-01	61.8146
2013-01-01	64.2031
2014-01-01	62.4106