Year	Percent
1999-01-01	0.1453730000000000
2000-01-01	7.5474700000000000
2001-01-01	7.5768900000000000
2002-01-01	8.3916899999999990
2003-01-01	7.6509899999999990
2004-01-01	6.5354000000000000
2005-01-01	5.8494100000000000
2006-01-01	5.4399200000000000
2007-01-01	4.2002200000000000
2008-01-01	1.5701200000000002
2009-01-01	2.9948000000000000
2010-01-01	2.7863300000000000
2011-01-01	2.3903600000000000
2012-01-01	3.4504300000000003
2013-01-01	3.3199500000000000
2014-01-01	2.1915100000000000
2015-01-01	2.8284000000000000
2016-01-01	3.9094100000000000