Year	Percent
1999-01-01	15.715200000000000
2000-01-01	17.154600000000000
2001-01-01	13.470500000000000
2002-01-01	12.235700000000000
2003-01-01	13.625500000000000
2004-01-01	16.222600000000000
2005-01-01	15.808800000000000
2006-01-01	20.613100000000000
2007-01-01	19.038800000000000
2008-01-01	7.786310000000000
2009-01-01	11.246400000000000
2010-01-01	9.595480000000000
2011-01-01	6.611110000000001
2012-01-01	9.433780000000000
2013-01-01	11.971500000000000
2014-01-01	11.158000000000000
2015-01-01	14.666800000000000
2016-01-01	11.726900000000000