Year Percent 1993-01-01 1.9533000000000000 1994-01-01 1.6247400000000000 1995-01-01 1.3712200000000000 1996-01-01 1.3144799999999999 1997-01-01 1.1762900000000000 1998-01-01 1.1067600000000000 1999-01-01 1.0955900000000000 2000-01-01 1.0544300000000000 2001-01-01 1.0914800000000000 2002-01-01 0.9649450000000000 2003-01-01 1.2505800000000000 2004-01-01 1.7083200000000000 2005-01-01 3.9087300000000003 2006-01-01 4.2167000000000000 2007-01-01 6.1372800000000005 2008-01-01 4.9836500000000000 2009-01-01 6.1091900000000000 2010-01-01 6.8160300000000005 2011-01-01 6.2766500000000000 2012-01-01 6.5832000000000000 2013-01-01 6.4195900000000000 2014-01-01 7.1702900000000000 2015-01-01 7.2804199999999994 2016-01-01 9.7042800000000000