Year	Percent
2005-01-01	8.35187757498442
2006-01-01	8.33855777286449
2007-01-01	7.33126765596177
2008-01-01	8.17826359196004
2009-01-01	9.55583922788571
2010-01-01	8.63246710284640
2011-01-01	7.42930925316209
2012-01-01	6.97682842264688
2013-01-01	5.76273415413177
2014-01-01	5.76951802449389
2015-01-01	6.13686880162542
2016-01-01	6.40586264134490
2017-01-01	6.71116018352008