Year	Percent
1996-01-01	45.475900000000000
1997-01-01	43.903500000000000
1998-01-01	40.854900000000000
1999-01-01	40.950600000000000
2000-01-01	41.187900000000000
2001-01-01	47.463300000000000
2002-01-01	48.508900000000000
2003-01-01	41.943000000000005
2004-01-01	42.322600000000000
2005-01-01	37.252200000000000
2006-01-01	28.044800000000000
2007-01-01	32.125100000000000
2008-01-01	28.995500000000000
2009-01-01	28.345100000000000
2010-01-01	32.059000000000000
2011-01-01	28.520000000000000
2012-01-01	23.528000000000002
2013-01-01	23.498800000000000
2014-01-01	22.326900000000000
2015-01-01	17.386600000000000
2016-01-01	32.205800000000000