Year	Percent
1996-01-01	56.555000000000000
1997-01-01	53.048100000000000
1998-01-01	54.516700000000000
1999-01-01	55.616100000000000
2000-01-01	49.171000000000010
2001-01-01	53.548500000000000
2002-01-01	53.245300000000000
2003-01-01	52.264600000000000
2004-01-01	49.212800000000000
2005-01-01	47.989800000000000
2006-01-01	47.170400000000000
2007-01-01	48.340200000000000
2008-01-01	47.195400000000000
2009-01-01	51.382600000000000
2010-01-01	51.789900000000000
2011-01-01	52.108999999999995
2012-01-01	52.202700000000000
2013-01-01	52.050600000000000
2014-01-01	52.518300000000000
2015-01-01	78.695400000000000
2016-01-01	66.531300000000000