Year	Percent
2005-01-01	2.58117970344854
2006-01-01	2.58656279759059
2007-01-01	2.60637172675586
2008-01-01	2.95326650317205
2009-01-01	4.35088557876311
2010-01-01	4.35017913381449
2011-01-01	4.13324390384239
2012-01-01	3.91244079653340
2013-01-01	3.93466978348843
2014-01-01	3.83096729683604
2015-01-01	3.40213140361963
2016-01-01	3.09447265392521
2017-01-01	2.63891493895542