Year	Percent
1996-01-01	50.9304
1997-01-01	64.8872
1998-01-01	61.7635
1999-01-01	65.4073
2000-01-01	55.9084
2001-01-01	55.8287
2002-01-01	56.1245
2003-01-01	76.1171
2004-01-01	60.3433
2005-01-01	65.4571
2006-01-01	62.0492
2007-01-01	62.8999
2008-01-01	56.9843
2009-01-01	62.5326
2010-01-01	62.5788
2011-01-01	64.6232
2012-01-01	57.9718
2013-01-01	54.4942
2014-01-01	55.1897
2015-01-01	63.9560
2016-01-01	63.5908