Year	Percent
1996-01-01	67.7574
1997-01-01	68.6973
1998-01-01	73.4861
1999-01-01	67.4001
2000-01-01	68.4363
2001-01-01	68.7339
2002-01-01	68.4423
2003-01-01	62.6218
2004-01-01	61.4257
2005-01-01	63.0655
2006-01-01	67.0771
2007-01-01	64.5093
2008-01-01	84.1045
2009-01-01	64.8741
2010-01-01	67.6545
2011-01-01	72.4824
2012-01-01	70.6226
2013-01-01	69.1253
2014-01-01	73.3170