Year	Percent
2000-01-01	3.30
2001-01-01	3.59
2002-01-01	4.17
2003-01-01	4.95
2004-01-01	5.63
2005-01-01	6.17
2006-01-01	6.88
2007-01-01	7.54
2008-01-01	7.41
2009-01-01	8.75
2010-01-01	8.90
2011-01-01	8.56
2012-01-01	9.54
2013-01-01	9.58
2014-01-01	10.39
2015-01-01	11.77
2016-01-01	13.34