Year Percent 1998-01-01 0.014584999999999999 1999-01-01 0.014584999999999999 2000-01-01 2.100220000000000000 2001-01-01 0.716357999999999900 2002-01-01 0.678888000000000000 2003-01-01 1.156810000000000100 2004-01-01 0.797742000000000100 2005-01-01 1.615279999999999800 2006-01-01 1.286690000000000000 2007-01-01 1.537980000000000000 2008-01-01 1.471960000000000000 2009-01-01 1.055729999999999800 2010-01-01 1.051700000000000000 2011-01-01 0.949929999999999900 2012-01-01 0.564811000000000000 2013-01-01 0.473714000000000000 2014-01-01 0.693912000000000000 2015-01-01 0.038301000000000000 2016-01-01 1.009970000000000000