Year	Percent
2006-01-01	17.90
2007-01-01	21.30
2008-01-01	23.30
2009-01-01	22.00
2010-01-01	20.00
2011-01-01	20.10
2012-01-01	18.30
2013-01-01	16.90
2014-01-01	16.20
2015-01-01	15.59