Year	Percent
2004-01-01	7.28
2005-01-01	8.05
2006-01-01	8.92
2007-01-01	10.68
2008-01-01	10.45
2009-01-01	11.61
2010-01-01	12.29
2011-01-01	12.37
2012-01-01	13.59
2013-01-01	13.88
2014-01-01	15.70
2015-01-01	17.68
2016-01-01	20.26