Year	Percent
1996-01-01	49.53360000000000
1997-01-01	49.59290000000000
1998-01-01	60.08790000000000
1999-01-01	67.02199999999999
2000-01-01	65.81700000000000
2001-01-01	61.40410000000000
2002-01-01	69.11530000000000
2003-01-01	69.00090000000000
2004-01-01	67.29410000000000
2005-01-01	62.98550000000000
2006-01-01	66.06630000000000
2007-01-01	62.20680000000000
2008-01-01	56.30780000000000
2009-01-01	56.53400000000000
2010-01-01	56.05930000000000
2011-01-01	54.25260000000000
2012-01-01	52.86940000000000
2013-01-01	50.36380000000000
2014-01-01	50.91850000000000
2015-01-01	47.50330000000000
2016-01-01	53.59380000000000