Year	Percent
1994-01-01	18.555800000000000
1995-01-01	20.341700000000000
1996-01-01	25.783400000000000
1997-01-01	36.843000000000000
1998-01-01	39.078100000000000
1999-01-01	42.543100000000000
2000-01-01	42.635500000000000
2001-01-01	42.982100000000000
2002-01-01	44.693800000000000
2003-01-01	43.495300000000000
2004-01-01	45.760600000000000
2005-01-01	48.627400000000000
2006-01-01	52.662600000000000
2007-01-01	56.795700000000000
2008-01-01	56.568999999999996
2009-01-01	55.674000000000000
2010-01-01	57.951600000000000
2011-01-01	63.978600000000000
2012-01-01	67.897900000000000
2013-01-01	69.680900000000000
2014-01-01	69.333200000000000
2015-01-01	69.050800000000000
2016-01-01	67.760000000000000