Year	Percent
2006-01-01	2.99
2007-01-01	3.36
2008-01-01	2.83
2009-01-01	3.98
2010-01-01	3.90
2011-01-01	3.21
2012-01-01	3.53
2013-01-01	4.14
2014-01-01	4.38
2015-01-01	5.60