Year	Percent
1999-01-01	9.1035399999999990
2000-01-01	5.2075300000000000
2001-01-01	4.3119800000000000
2002-01-01	3.6745500000000000
2003-01-01	4.5624300000000000
2004-01-01	6.6336600000000010
2005-01-01	2.5899799999999997
2006-01-01	17.2626000000000000
2007-01-01	7.8157600000000010
2008-01-01	6.9567200000000000
2009-01-01	5.6529900000000000
2010-01-01	7.8132699999999990
2011-01-01	4.6787800000000010
2012-01-01	6.4786400000000000
2013-01-01	7.2237500000000000
2014-01-01	6.6297200000000000
2015-01-01	1.2339500000000000
2016-01-01	10.2467000000000000