Year	Percent
1998-01-01	45.131400000000000
1999-01-01	47.362700000000000
2000-01-01	47.900000000000000
2001-01-01	32.600000000000000
2002-01-01	27.899700000000000
2003-01-01	41.647000000000000
2004-01-01	44.822600000000000
2005-01-01	45.937200000000000
2006-01-01	45.295600000000000
2007-01-01	53.331900000000000
2008-01-01	46.095900000000000
2009-01-01	47.690600000000000
2010-01-01	57.733000000000004
2011-01-01	55.193500000000000
2012-01-01	60.005800000000000
2013-01-01	62.428800000000000
2014-01-01	60.430100000000000
2015-01-01	47.861200000000000
2016-01-01	59.059300000000000