Year	Percent
2001-01-01	15.500000000000000
2002-01-01	14.100000000000000
2003-01-01	14.800000000000000
2004-01-01	15.400000000000000
2005-01-01	14.600000000000000
2006-01-01	14.200000000000000
2007-01-01	15.800000000000000
2008-01-01	15.500000000000000
2009-01-01	15.000000000000000
2010-01-01	15.293400000000000
2011-01-01	14.018400000000000
2012-01-01	14.215700000000000
2013-01-01	14.437000000000001
2014-01-01	14.658300000000000
2015-01-01	14.252700000000000
2016-01-01	15.145900000000000