Year	Percent
2001-01-01	3.4000000000000000
2002-01-01	3.5000000000000000
2003-01-01	3.9000000000000000
2004-01-01	2.4000000000000000
2005-01-01	2.3000000000000000
2006-01-01	2.6000000000000000
2007-01-01	2.8000000000000000
2008-01-01	3.1000000000000000
2009-01-01	2.7000000000000000
2010-01-01	1.9647299999999999
2011-01-01	1.4863500000000000
2012-01-01	1.3373500000000000
2013-01-01	1.2856500000000000
2014-01-01	1.4533500000000000
2015-01-01	1.5516900000000000
2016-01-01	1.5445500000000000