Year	Percent
1996-01-01	69.9519
1997-01-01	67.3617
1998-01-01	71.9591
1999-01-01	77.8894
2000-01-01	77.7024
2001-01-01	83.0747
2002-01-01	72.3688
2003-01-01	81.7076
2004-01-01	77.9145
2005-01-01	63.5469
2006-01-01	68.9244
2007-01-01	69.4395
2008-01-01	95.0808
2009-01-01	81.6062
2010-01-01	83.1963
2011-01-01	83.5292
2012-01-01	72.8381
2013-01-01	79.4357
2014-01-01	79.3187