Year	Percent
1996-01-01	53.4775
1997-01-01	60.4991
1998-01-01	54.9515
1999-01-01	61.6642
2000-01-01	53.3769
2001-01-01	59.3742
2002-01-01	58.1596
2003-01-01	61.5195
2004-01-01	60.6911
2005-01-01	62.5915
2006-01-01	63.1821
2007-01-01	54.9263
2008-01-01	56.9038
2009-01-01	54.0438
2010-01-01	54.6194
2011-01-01	59.3423
2012-01-01	51.8657
2013-01-01	58.3164
2014-01-01	54.2744