Year	Percent
1996-01-01	74.515500000000000
1997-01-01	58.428500000000000
1998-01-01	43.841200000000000
1999-01-01	28.189800000000000
2000-01-01	37.203700000000000
2001-01-01	26.662800000000000
2002-01-01	19.480900000000000
2003-01-01	19.255700000000000
2004-01-01	20.613000000000003
2005-01-01	17.910100000000000
2006-01-01	16.752600000000000
2007-01-01	8.422340000000000
2008-01-01	10.734000000000002
2009-01-01	6.097580000000001
2010-01-01	5.476360000000000
2011-01-01	6.998280000000000
2012-01-01	8.164439999999999
2013-01-01	9.076050000000000
2014-01-01	6.690169999999999
2015-01-01	7.343970000000000
2016-01-01	7.039610000000001