Year	Percent
2001-01-01	15.100000000000000
2002-01-01	18.700000000000000
2003-01-01	18.700000000000000
2004-01-01	19.000000000000000
2005-01-01	19.800000000000000
2006-01-01	17.900000000000000
2007-01-01	16.000000000000000
2008-01-01	18.600000000000000
2009-01-01	16.700000000000000
2010-01-01	13.641700000000000
2011-01-01	13.976500000000000
2012-01-01	14.353600000000000
2013-01-01	13.962200000000000
2014-01-01	13.323100000000000
2015-01-01	12.822000000000001
2016-01-01	13.456400000000000