Year	Percent
1998-01-01	62.800000000000000
1999-01-01	48.400000000000000
2000-01-01	48.400000000000000
2001-01-01	49.900000000000000
2002-01-01	58.300000000000000
2003-01-01	58.300000000000000
2004-01-01	58.300000000000000
2005-01-01	50.900000000000000
2006-01-01	52.800000000000000
2007-01-01	55.100000000000000
2008-01-01	61.600000000000000
2009-01-01	57.300000000000000
2010-01-01	49.852700000000000
2011-01-01	50.461999999999996
2012-01-01	54.511500000000000
2013-01-01	48.048600000000000
2014-01-01	58.243500000000000
2015-01-01	61.809500000000000
2016-01-01	53.595100000000000