Year	Percent
1998-01-01	11.6155000000000000
1999-01-01	12.0034000000000000
2000-01-01	8.2535400000000000
2001-01-01	8.7093700000000000
2002-01-01	9.5391700000000000
2003-01-01	6.7340000000000000
2004-01-01	4.6954300000000000
2005-01-01	3.9410800000000004
2006-01-01	2.9050599999999998
2007-01-01	1.9377300000000000
2008-01-01	1.4772100000000001
2009-01-01	1.4344500000000000
2010-01-01	1.2998100000000001
2011-01-01	1.2420000000000000
2012-01-01	2.9709400000000000
2013-01-01	4.6483800000000000
2014-01-01	4.4974000000000000
2015-01-01	4.4513300000000005
2016-01-01	7.2567200000000000