Year Percent 1998-01-01 0.014377000000000001 1999-01-01 0.019927000000000000 2000-01-01 0.019927000000000000 2001-01-01 0.019927000000000000 2002-01-01 0.019927000000000000 2003-01-01 0.019927000000000000 2004-01-01 0.019927000000000000 2005-01-01 0.019927000000000000 2006-01-01 0.019927000000000000 2007-01-01 0.019927000000000000 2008-01-01 0.019927000000000000 2009-01-01 0.019927000000000000 2010-01-01 0.019927000000000000 2011-01-01 0.019927000000000000 2012-01-01 0.019927000000000000 2013-01-01 0.019927000000000000 2014-01-01 0.045318000000000004 2015-01-01 0.124209999999999990