Year Percent 1999-01-01 0.3741060000000000000 2000-01-01 0.3773700000000000000 2001-01-01 0.1519890000000000000 2002-01-01 0.0652220000000000000 2003-01-01 0.0525029999999999940 2004-01-01 0.0382610000000000000 2005-01-01 0.0534120000000000000 2006-01-01 0.2064869999999999800 2007-01-01 0.0544889999999999960 2008-01-01 1.3374600000000000000 2009-01-01 0.0649179999999999900 2010-01-01 0.0020109999999999998 2011-01-01 0.0403269999999999950 2012-01-01 0.0386260000000000000 2013-01-01 0.0036740000000000000 2014-01-01 0.0054979999999999990 2015-01-01 0.0044820000000000000