Year	Percent
2002-01-01	13.285400000000000
2003-01-01	23.617100000000000
2004-01-01	26.682800000000000
2005-01-01	23.132300000000000
2006-01-01	23.867500000000000
2007-01-01	23.474000000000000
2008-01-01	24.568100000000000
2009-01-01	21.304300000000000
2010-01-01	17.996200000000000
2011-01-01	17.161400000000000
2012-01-01	15.207300000000000
2013-01-01	16.444000000000003
2014-01-01	15.033000000000000
2015-01-01	15.125200000000000
2016-01-01	15.334500000000000
2017-01-01	15.343400000000000