Year	Percent
2001-01-01	50.663100000000000
2002-01-01	51.074700000000000
2003-01-01	51.519900000000000
2004-01-01	50.304700000000000
2005-01-01	50.305900000000000
2006-01-01	50.898600000000000
2007-01-01	52.674800000000000
2008-01-01	55.322200000000000
2009-01-01	61.538400000000000
2010-01-01	61.333200000000000
2011-01-01	57.828500000000000
2012-01-01	54.755800000000000
2013-01-01	51.156300000000000
2014-01-01	46.632600000000000
2015-01-01	47.077200000000000
2016-01-01	49.196000000000005