Year	Percent
2001-01-01	1.56
2002-01-01	1.71
2003-01-01	1.73
2004-01-01	1.77
2005-01-01	1.74
2006-01-01	1.68
2007-01-01	1.72
2008-01-01	1.69
2009-01-01	1.76
2010-01-01	1.85
2011-01-01	1.91
2012-01-01	1.91
2013-01-01	1.92
2014-01-01	1.91
2015-01-01	1.94