Year	Percent
1996-01-01	78.9680
1997-01-01	77.5204
1998-01-01	81.5995
1999-01-01	58.3625
2000-01-01	50.5733
2001-01-01	50.6298
2002-01-01	54.4208
2003-01-01	47.6012
2004-01-01	49.9824
2005-01-01	33.7944
2006-01-01	31.8325
2007-01-01	29.3082
2008-01-01	28.9698
2009-01-01	36.3619
2010-01-01	36.5041
2011-01-01	35.4955
2012-01-01	38.7401
2013-01-01	38.0575
2014-01-01	41.6857
2015-01-01	55.2536
2016-01-01	54.7980