Year	Percent
2001-01-01	0.27
2002-01-01	0.28
2003-01-01	0.29
2004-01-01	0.28
2005-01-01	0.29
2006-01-01	0.34
2007-01-01	0.35
2008-01-01	1.74
2009-01-01	1.94
2010-01-01	1.96
2011-01-01	1.91
2012-01-01	1.99
2013-01-01	2.13
2014-01-01	2.20
2015-01-01	2.26
2016-01-01	2.45