Year	Percent
2001-01-01	18.717100000000000
2002-01-01	19.641700000000000
2003-01-01	21.645100000000000
2004-01-01	18.616400000000000
2005-01-01	18.994600000000000
2006-01-01	17.253700000000000
2007-01-01	14.429300000000000
2008-01-01	11.124400000000000
2009-01-01	12.934000000000001
2010-01-01	13.683200000000000
2011-01-01	13.143300000000000
2012-01-01	13.077200000000000
2013-01-01	11.812500000000000
2014-01-01	10.666100000000000
2015-01-01	9.649239999999999
2016-01-01	9.011989999999999