Year Percent 1999-01-01 0.253000000000000000 2000-01-01 0.276000000000000000 2001-01-01 0.045000000000000000 2002-01-01 0.016000000000000000 2003-01-01 0.024000000000000000 2004-01-01 0.059000000000000004 2005-01-01 0.829369000000000000 2006-01-01 0.714957000000000000 2007-01-01 0.733122000000000000 2008-01-01 0.678173999999999900 2009-01-01 0.688246000000000000 2010-01-01 0.558230000000000000 2011-01-01 0.585785999999999900 2012-01-01 0.148016000000000000 2013-01-01 0.030172000000000004 2014-01-01 0.316793000000000000 2015-01-01 0.293885000000000000 2016-01-01 0.590000000000000000