Year	Percent
1998-01-01	0.33998100000000000
1999-01-01	0.34530300000000000
2000-01-01	0.37535799999999997
2001-01-01	0.40107100000000000
2002-01-01	0.31760900000000003
2003-01-01	0.29123899999999997
2004-01-01	0.63862100000000000
2005-01-01	0.57191600000000000
2006-01-01	0.47859700000000005
2007-01-01	0.40819000000000000
2008-01-01	0.21126100000000000
2009-01-01	0.21126100000000000
2010-01-01	0.21126100000000000
2011-01-01	0.21126100000000000
2012-01-01	0.70588900000000000
2013-01-01	2.45647000000000000
2014-01-01	2.78454000000000020
2015-01-01	2.72887999999999980
2016-01-01	2.69775000000000000