Year	Percent
1996-01-01	40.794100000000000
1997-01-01	39.890900000000000
1998-01-01	35.205800000000000
1999-01-01	36.513000000000005
2000-01-01	36.831600000000000
2001-01-01	36.585600000000000
2002-01-01	30.327800000000000
2003-01-01	29.802200000000000
2004-01-01	32.671900000000000
2005-01-01	31.213800000000000
2006-01-01	31.871500000000000
2007-01-01	26.085200000000000
2008-01-01	25.878400000000000
2009-01-01	27.699800000000000
2010-01-01	32.603800000000000
2011-01-01	36.776400000000000
2012-01-01	31.354000000000000
2013-01-01	30.470800000000000
2014-01-01	31.189700000000000
2015-01-01	38.281000000000000
2016-01-01	35.547300000000000