Year	Percent
1996-01-01	78.6697
1997-01-01	72.8041
1998-01-01	72.8041
1999-01-01	79.8582
2000-01-01	86.3808
2001-01-01	87.8618
2002-01-01	61.5774
2003-01-01	50.6106
2004-01-01	63.8616
2005-01-01	80.5179
2006-01-01	87.4815
2007-01-01	83.6767
2008-01-01	85.7219
2009-01-01	63.5145
2010-01-01	79.7970
2011-01-01	80.7418
2012-01-01	58.4066
2013-01-01	39.3986
2014-01-01	40.9514
2015-01-01	56.1492
2016-01-01	56.5258