Year Percent 1993-01-01 0.04401500000000000 1994-01-01 0.17369600000000002 1995-01-01 0.34043200000000000 1996-01-01 1.06708000000000000 1997-01-01 1.46447000000000020 1998-01-01 1.52870000000000000 1999-01-01 1.85607000000000000 2000-01-01 1.72734000000000000 2001-01-01 1.04708000000000000 2002-01-01 0.22732399999999997 2003-01-01 0.95704800000000000 2004-01-01 0.37115700000000000 2005-01-01 0.32241100000000000 2006-01-01 0.29754000000000000 2007-01-01 0.58019800000000000 2008-01-01 1.19018999999999990 2009-01-01 1.82855000000000000 2010-01-01 3.01143000000000000 2011-01-01 2.74068000000000000 2012-01-01 1.29095000000000000 2013-01-01 0.88758600000000010 2014-01-01 0.37856500000000000 2015-01-01 0.00038300000000000