Year Percent 2002-01-01 0.05325600000000000 2003-01-01 0.07860700000000001 2004-01-01 0.06859400000000000 2005-01-01 0.03288000000000000 2006-01-01 0.00342800000000000 2007-01-01 0.00780800000000000 2008-01-01 0.00780800000000000 2009-01-01 0.00780800000000000 2010-01-01 0.00780800000000000 2011-01-01 0.00780800000000000 2012-01-01 0.00780800000000000 2013-01-01 4.11008000000000000 2014-01-01 6.78264000000000000 2015-01-01 7.68767000000000000 2016-01-01 7.28355000000000000