Year Percent 1996-01-01 2.1457900000000003 1997-01-01 0.5373080000000000 1998-01-01 0.9418450000000000 1999-01-01 1.2418100000000000 2000-01-01 1.0936800000000000 2001-01-01 1.1514400000000000 2002-01-01 1.0550500000000000 2003-01-01 1.1517200000000000 2004-01-01 0.9030850000000000 2005-01-01 1.0412900000000000 2006-01-01 1.0168200000000000 2007-01-01 0.8802490000000000 2008-01-01 0.9845010000000001 2009-01-01 1.0194800000000000 2010-01-01 1.1982000000000000 2011-01-01 1.2741200000000001 2012-01-01 1.2415399999999999 2013-01-01 1.2436500000000000 2014-01-01 1.1945700000000001 2015-01-01 1.2804900000000000 2016-01-01 1.3325500000000000