Year	Percent
1996-01-01	48.946400000000000
1997-01-01	49.741200000000000
1998-01-01	60.039500000000000
1999-01-01	67.070300000000000
2000-01-01	76.594800000000000
2001-01-01	69.926200000000000
2002-01-01	76.516100000000000
2003-01-01	78.320400000000000
2004-01-01	43.036400000000000
2005-01-01	41.600300000000000
2006-01-01	40.650999999999996
2007-01-01	41.546400000000000
2008-01-01	37.124500000000000
2009-01-01	36.628400000000000
2010-01-01	34.326400000000000
2011-01-01	35.501200000000000
2012-01-01	34.316500000000000
2013-01-01	37.959100000000000
2014-01-01	39.458500000000000
2015-01-01	41.976900000000000
2016-01-01	40.284600000000000