Year	Percent
2006-01-01	9.14448097378434
2007-01-01	9.17604997279976
2008-01-01	10.01164845960930
2009-01-01	12.64328904633580
2010-01-01	11.41912003853800
2011-01-01	10.08812177335240
2012-01-01	9.38994193648447
2013-01-01	10.56207984772240
2014-01-01	11.82801451420600
2015-01-01	12.60086448506640
2016-01-01	13.61376582794470
2017-01-01	13.90000660326680