Year	Percent
2001-01-01	0.53
2002-01-01	2.41
2003-01-01	2.04
2004-01-01	1.73
2005-01-01	1.34
2006-01-01	1.36
2007-01-01	1.39
2008-01-01	1.34
2009-01-01	1.47
2010-01-01	1.42
2011-01-01	1.42
2012-01-01	1.45
2013-01-01	1.47
2014-01-01	1.49
2015-01-01	1.53
2016-01-01	1.58