Year	Percent
1996-01-01	36.153800000000000
1997-01-01	37.009600000000000
1998-01-01	42.121500000000000
1999-01-01	41.402700000000000
2000-01-01	43.990100000000000
2001-01-01	50.543200000000000
2002-01-01	49.355900000000000
2003-01-01	49.278100000000000
2004-01-01	46.947900000000000
2005-01-01	52.861999999999995
2006-01-01	49.069800000000000
2007-01-01	41.534200000000000
2008-01-01	42.166300000000000
2009-01-01	42.705800000000000
2010-01-01	46.190700000000000
2011-01-01	45.251700000000000
2012-01-01	47.568100000000000
2013-01-01	48.306999999999995
2014-01-01	49.400900000000000
2015-01-01	46.222300000000000
2016-01-01	42.868600000000000