Year	Percent
1993-01-01	51.136500000000000
1994-01-01	50.048300000000000
1995-01-01	52.110800000000000
1996-01-01	52.704400000000000
1997-01-01	52.163300000000000
1998-01-01	51.105000000000000
1999-01-01	48.532100000000000
2000-01-01	49.913999999999994
2001-01-01	53.228800000000000
2002-01-01	55.391700000000000
2003-01-01	55.973200000000000
2004-01-01	54.625800000000000
2005-01-01	53.992500000000000
2006-01-01	54.906900000000000
2007-01-01	55.576400000000000
2008-01-01	59.633400000000000
2009-01-01	61.443600000000000
2010-01-01	60.270900000000000
2011-01-01	60.230000000000000
2012-01-01	62.603800000000000
2013-01-01	65.221400000000000
2014-01-01	65.433300000000000
2015-01-01	65.860600000000000
2016-01-01	67.556900000000000