Year	Percent
2006-01-01	2.86781867449818
2007-01-01	2.93088461814250
2008-01-01	3.26827669993484
2009-01-01	4.32907770189254
2010-01-01	3.77964455124572
2011-01-01	3.21267647307034
2012-01-01	2.99213773689198
2013-01-01	3.27943719253511
2014-01-01	3.75527967904496