Year	Percent
1994-01-01	58.318000000000005
1995-01-01	64.339200000000000
1996-01-01	72.064100000000000
1997-01-01	66.477900000000000
1998-01-01	58.455800000000000
1999-01-01	64.528400000000000
2000-01-01	68.710600000000000
2001-01-01	70.185200000000000
2002-01-01	71.626400000000000
2003-01-01	73.590900000000000
2004-01-01	77.852100000000000
2005-01-01	81.264500000000000
2006-01-01	84.102600000000000
2007-01-01	86.557999999999990
2008-01-01	88.002400000000000
2009-01-01	88.984200000000000
2010-01-01	90.580800000000000
2011-01-01	92.065900000000000
2012-01-01	92.370700000000000
2013-01-01	92.506100000000000
2014-01-01	92.486700000000000
2015-01-01	92.039500000000000
2016-01-01	92.879600000000000