Year	Percent
1996-01-01	49.0714
1997-01-01	46.7273
1998-01-01	50.7843
1999-01-01	48.5045
2000-01-01	33.4570
2001-01-01	42.1680
2002-01-01	35.8135
2003-01-01	34.7842
2004-01-01	35.1139
2005-01-01	34.1182
2006-01-01	36.7675
2007-01-01	33.7057
2008-01-01	32.5719
2009-01-01	31.4695
2010-01-01	29.0707
2011-01-01	32.8636
2012-01-01	29.6929
2013-01-01	30.2679
2014-01-01	30.3765
2015-01-01	36.1834
2016-01-01	32.2028