Year Percent 1996-01-01 0.9276010000000000 1997-01-01 1.2941100000000000 1998-01-01 0.9138240000000000 1999-01-01 1.4690000000000000 2000-01-01 2.1918800000000000 2001-01-01 1.4512700000000000 2002-01-01 0.1680990000000000 2003-01-01 1.7279500000000000 2004-01-01 2.4891900000000002 2005-01-01 3.1061600000000000 2006-01-01 2.4839100000000000 2007-01-01 4.4668300000000000 2008-01-01 3.9317900000000003 2009-01-01 1.7481000000000000 2010-01-01 3.1316400000000000 2011-01-01 3.5572300000000000 2012-01-01 4.3816400000000000 2013-01-01 4.4245400000000000 2014-01-01 2.5708000000000000 2015-01-01 0.4994790000000000 2016-01-01 1.2058900000000000