Year	Percent
2005-01-01	3.89272479033958
2006-01-01	3.24469622017850
2007-01-01	2.98505843364671
2008-01-01	3.35005708260347
2009-01-01	4.17832770157209
2010-01-01	3.69838299030002
2011-01-01	3.32354448483102
2012-01-01	3.00416065117634
2013-01-01	2.78364135132491
2014-01-01	3.02493952472598
2015-01-01	2.94723470363175
2016-01-01	3.08121815839162
2017-01-01	3.19463712850529