Year	Percent
2001-01-01	8.4111300000000000
2002-01-01	7.6498100000000000
2003-01-01	4.7212900000000000
2004-01-01	5.4989700000000000
2005-01-01	5.4053300000000000
2006-01-01	5.8368600000000000
2007-01-01	9.2195400000000000
2008-01-01	7.3714100000000010
2009-01-01	5.5067200000000000
2010-01-01	2.2895300000000000
2011-01-01	2.5340000000000003
2012-01-01	3.2608700000000000
2013-01-01	2.8987000000000000
2014-01-01	2.6731500000000000
2015-01-01	3.1972500000000000
2016-01-01	3.3032800000000004
2017-01-01	3.1584200000000000