Year	Percent
2007-01-01	11.64997445181060
2008-01-01	8.20461492682667
2009-01-01	7.46916666666666
2010-01-01	7.19353613051804
2011-01-01	6.78819444444446
2012-01-01	6.58835961632254
2013-01-01	5.51827136955831
2014-01-01	4.64546204670158
2015-01-01	6.69367927894743
2016-01-01	10.88328586224750
2017-01-01	18.21980919577140