Year	Percent
2001-01-01	7.9398800000000005
2002-01-01	4.2018800000000000
2003-01-01	3.1291700000000002
2004-01-01	2.9650700000000000
2005-01-01	3.5202900000000000
2006-01-01	3.2274900000000000
2007-01-01	3.1966200000000002
2008-01-01	3.5038800000000000
2009-01-01	3.5527300000000004
2010-01-01	3.1508599999999998
2011-01-01	3.1792900000000000
2012-01-01	3.0212400000000000
2013-01-01	2.9033500000000000
2014-01-01	2.7877400000000003
2015-01-01	2.6250400000000003
2016-01-01	2.3721900000000002