Year Percent 1993-01-01 1.2910900000000000 1994-01-01 1.2928200000000000 1995-01-01 1.5001400000000000 1996-01-01 1.3603299999999998 1997-01-01 1.5805600000000000 1998-01-01 1.2130100000000001 1999-01-01 1.3979300000000000 2000-01-01 1.3158600000000000 2001-01-01 1.5974800000000000 2002-01-01 2.0047700000000000 2003-01-01 2.0891300000000000 2004-01-01 1.8804700000000000 2005-01-01 1.6407000000000000 2006-01-01 1.3393300000000000 2007-01-01 1.2722200000000001 2008-01-01 2.0826700000000002 2009-01-01 2.7640599999999997 2010-01-01 3.4315200000000000 2011-01-01 3.0358200000000000 2012-01-01 3.1614400000000002 2013-01-01 3.1797600000000000 2014-01-01 3.1568900000000000 2015-01-01 2.9585700000000000 2016-01-01 2.8248700000000000