Year Percent 1996-01-01 1.54634000000000000 1997-01-01 1.68990000000000000 1998-01-01 1.22106000000000000 1999-01-01 1.65624000000000020 2000-01-01 2.08736000000000000 2001-01-01 2.13545000000000000 2002-01-01 1.97888000000000000 2003-01-01 2.10802000000000020 2004-01-01 2.58045000000000000 2005-01-01 3.28608000000000000 2006-01-01 3.34770999999999970 2007-01-01 2.99506000000000000 2008-01-01 0.29339499999999996 2009-01-01 1.03765000000000000 2010-01-01 1.54504000000000000 2011-01-01 1.53695000000000000 2012-01-01 1.35645000000000000 2013-01-01 1.04176000000000000 2014-01-01 1.14670000000000000 2015-01-01 1.13902000000000010 2016-01-01 1.12396000000000000