Year	Percent
2004-01-01	2.2016700000000000
2005-01-01	2.7562500000000000
2006-01-01	3.8387200000000000
2007-01-01	3.6123300000000005
2008-01-01	3.2693500000000000
2009-01-01	3.4122700000000000
2010-01-01	3.3978000000000000
2011-01-01	2.8108000000000000
2012-01-01	3.0558900000000000
2013-01-01	3.0892600000000000
2014-01-01	6.1827500000000000
2015-01-01	5.3183900000000000
2016-01-01	5.2769900000000005