Year	Percent
2003-01-01	1.25
2004-01-01	1.24
2005-01-01	1.45
2006-01-01	1.52
2007-01-01	1.72
2008-01-01	1.80
2009-01-01	2.19
2010-01-01	5.90
2011-01-01	6.28
2012-01-01	6.35
2013-01-01	6.58
2014-01-01	6.79
2015-01-01	6.64
2016-01-01	6.80