Year Percent 1993-01-01 4.74011000000000000 1994-01-01 6.86383000000000000 1995-01-01 9.07704000000000000 1996-01-01 8.40506000000000000 1997-01-01 9.01541000000000100 1998-01-01 12.31440000000000000 1999-01-01 12.22400000000000000 2000-01-01 5.91718000000000000 2001-01-01 5.33116999999999900 2002-01-01 4.53924000000000000 2003-01-01 3.71683000000000030 2004-01-01 2.50827000000000000 2005-01-01 1.56690000000000000 2006-01-01 0.92647600000000010 2007-01-01 0.84069200000000000 2008-01-01 0.81769300000000000 2009-01-01 0.87963400000000000 2010-01-01 0.71795800000000000 2011-01-01 0.57674700000000000 2012-01-01 0.51984400000000000 2013-01-01 0.50816000000000010 2014-01-01 0.46319000000000000 2015-01-01 0.54332700000000000 2016-01-01 0.49040600000000006