Year	Percent
2005-01-01	1.9811299999999998
2006-01-01	1.9606700000000001
2007-01-01	2.1254200000000000
2008-01-01	2.3819900000000000
2009-01-01	2.7037900000000000
2010-01-01	2.6039100000000000
2011-01-01	2.9488100000000000
2012-01-01	4.1683000000000000
2013-01-01	5.2863200000000000
2014-01-01	5.5749900000000010
2015-01-01	6.9993300000000005
2016-01-01	8.9481600000000010