Year	Percent
1998-01-01	0.166618000000000020
1999-01-01	0.087052000000000000
2000-01-01	0.062095000000000004
2001-01-01	0.062095000000000004
2002-01-01	0.062095000000000004
2003-01-01	0.020701000000000000
2004-01-01	0.030024000000000002
2005-01-01	0.041495000000000000
2006-01-01	0.048998000000000000
2007-01-01	0.064301000000000000
2008-01-01	0.075478000000000000
2009-01-01	0.078133000000000010
2010-01-01	0.070548000000000000
2011-01-01	0.075265000000000000
2012-01-01	0.073578999999999990
2013-01-01	0.069376000000000000
2014-01-01	0.068018000000000000
2015-01-01	0.068415999999999990