Year	Percent
2000-01-01	4.78
2001-01-01	4.98
2002-01-01	5.24
2003-01-01	5.46
2004-01-01	5.74
2005-01-01	6.13
2006-01-01	6.68
2007-01-01	7.21
2008-01-01	7.39
2009-01-01	8.44
2010-01-01	9.18
2011-01-01	9.62
2012-01-01	10.30
2013-01-01	10.47
2014-01-01	11.17
2015-01-01	11.29
2016-01-01	11.41