Year	Percent
1996-01-01	30.582500000000000
1997-01-01	34.678700000000000
1998-01-01	30.701500000000000
1999-01-01	33.287900000000000
2000-01-01	47.383400000000000
2001-01-01	43.215500000000000
2002-01-01	32.666100000000000
2003-01-01	62.071999999999996
2004-01-01	56.497200000000000
2005-01-01	55.282600000000000
2006-01-01	55.278700000000000
2007-01-01	52.042700000000000
2008-01-01	55.849600000000000
2009-01-01	51.532400000000000
2010-01-01	49.126000000000005
2011-01-01	51.984400000000000
2012-01-01	50.677300000000000
2013-01-01	48.482200000000000
2014-01-01	48.652400000000000
2015-01-01	50.576800000000000
2016-01-01	40.911800000000000