Year	Percent
1996-01-01	71.362600000000000
1997-01-01	66.037700000000000
1998-01-01	67.342100000000000
1999-01-01	64.052700000000000
2000-01-01	60.222300000000000
2001-01-01	62.861600000000000
2002-01-01	51.527200000000000
2003-01-01	51.451700000000000
2004-01-01	46.433000000000000
2005-01-01	46.056400000000000
2006-01-01	42.049100000000000
2007-01-01	38.577400000000000
2008-01-01	28.148100000000000
2009-01-01	23.329500000000000
2010-01-01	22.073800000000000
2011-01-01	23.391500000000000
2012-01-01	20.824100000000000
2013-01-01	21.406999999999996
2014-01-01	25.577700000000000
2015-01-01	27.502100000000000
2016-01-01	28.729100000000000