Year	Percent
2000-01-01	4.96
2001-01-01	3.85
2002-01-01	3.97
2003-01-01	3.85
2004-01-01	4.31
2005-01-01	4.05
2006-01-01	5.40
2007-01-01	6.54
2008-01-01	8.97
2009-01-01	6.44
2010-01-01	8.40
2011-01-01	6.62
2012-01-01	7.10
2013-01-01	6.62
2014-01-01	6.58
2015-01-01	7.28
2016-01-01	8.85