Year	Percent
1996-01-01	65.4154
1997-01-01	69.4661
1998-01-01	63.7928
1999-01-01	68.4338
2000-01-01	66.6943
2001-01-01	66.2323
2002-01-01	67.1982
2003-01-01	60.6487
2004-01-01	61.9429
2005-01-01	71.9259
2006-01-01	77.2337
2007-01-01	77.0439
2008-01-01	63.6802
2009-01-01	75.1573
2010-01-01	78.4830
2011-01-01	72.8345
2012-01-01	71.6114
2013-01-01	65.7043
2014-01-01	63.6207