Year	Percent
1994-01-01	41.7137
1995-01-01	40.7223
1996-01-01	41.7792
1997-01-01	46.0655
1998-01-01	35.2854
1999-01-01	34.4948
2000-01-01	33.8112
2001-01-01	33.2394
2002-01-01	34.2996
2003-01-01	34.0681
2004-01-01	35.9078
2005-01-01	38.7721
2006-01-01	44.2653
2007-01-01	50.5321
2008-01-01	55.6371
2009-01-01	59.1184
2010-01-01	58.9009
2011-01-01	61.8284
2012-01-01	63.5180
2013-01-01	63.4013
2014-01-01	62.9795
2015-01-01	61.2228
2016-01-01	58.5133