Year	Percent
1996-01-01	81.3393
1997-01-01	80.8510
1998-01-01	97.3109
1999-01-01	87.5077
2000-01-01	75.1231
2001-01-01	71.7205
2002-01-01	86.5565
2003-01-01	83.9649
2004-01-01	75.4170
2005-01-01	72.1018
2006-01-01	70.0324
2007-01-01	77.2937
2008-01-01	68.2343
2009-01-01	59.6979
2010-01-01	62.6874
2011-01-01	74.7785
2012-01-01	83.8339
2013-01-01	72.7668
2014-01-01	79.0279
2015-01-01	48.9174
2016-01-01	50.7015