Year Percent 1996-01-01 6.1873800000000000 1997-01-01 8.7329000000000000 1998-01-01 9.6359900000000000 1999-01-01 3.4726600000000000 2000-01-01 3.2340100000000000 2001-01-01 0.9382290000000001 2002-01-01 0.9382290000000001 2003-01-01 0.9382290000000001 2004-01-01 0.9382290000000001 2005-01-01 0.9373680000000000 2006-01-01 0.1925170000000000 2007-01-01 2.6517300000000000 2008-01-01 1.7855400000000001 2009-01-01 0.2648460000000000 2010-01-01 7.9154700000000000 2011-01-01 3.9108500000000000 2012-01-01 4.0728000000000000 2013-01-01 4.0728000000000000 2014-01-01 1.6082299999999998 2015-01-01 0.6348180000000000 2016-01-01 1.8497800000000000