Year	Percent
1997-01-01	4.3344000000000000
1998-01-01	1.0969200000000001
1999-01-01	1.6215300000000000
2000-01-01	0.6581899999999999
2001-01-01	8.0926200000000000
2002-01-01	1.5131700000000001
2003-01-01	2.0798500000000000
2004-01-01	1.3248100000000000
2005-01-01	1.0261000000000000
2006-01-01	1.4049100000000000
2007-01-01	1.6591700000000000
2008-01-01	1.7115300000000000
2009-01-01	1.1951900000000000
2010-01-01	1.2065700000000001
2011-01-01	1.1435899999999999
2012-01-01	1.2825200000000000
2013-01-01	1.2618500000000000
2014-01-01	1.2384899999999999
2015-01-01	1.4052500000000000
2016-01-01	1.2178000000000000