Year	Percent
2005-01-01	3.03860249764423
2006-01-01	3.31452859032422
2007-01-01	3.64512542343576
2008-01-01	3.44716106632910
2009-01-01	4.09033561714941
2010-01-01	4.01376590386096
2011-01-01	4.08195440799566
2012-01-01	3.48508422176894
2013-01-01	2.86014770368411
2014-01-01	3.19055842041749
2015-01-01	2.76651675621382
2016-01-01	4.17333015500306
2017-01-01	3.96414670721884