Year	Percent
2002-01-01	0.46
2003-01-01	0.44
2004-01-01	0.45
2005-01-01	0.44
2006-01-01	0.43
2007-01-01	0.47
2008-01-01	1.05
2009-01-01	1.15
2010-01-01	1.22
2011-01-01	1.32
2012-01-01	1.54
2013-01-01	1.73
2014-01-01	1.81
2015-01-01	2.01