Year Percent 1995-01-01 10.6826000000000000 1996-01-01 7.8132100000000010 1997-01-01 10.9750000000000000 1998-01-01 9.5673500000000000 1999-01-01 7.5847200000000000 2000-01-01 7.1309700000000000 2001-01-01 6.3781200000000000 2002-01-01 5.8398100000000000 2003-01-01 4.5067400000000000 2004-01-01 3.5407400000000000 2005-01-01 3.1745799999999997 2006-01-01 2.8801300000000000 2007-01-01 2.4203300000000000 2008-01-01 2.0106599999999997 2009-01-01 2.1504100000000000 2010-01-01 5.5336800000000000 2011-01-01 5.0190600000000000 2012-01-01 5.3166500000000000 2013-01-01 5.2597500000000000 2014-01-01 4.7096200000000000 2015-01-01 6.6077000000000000 2016-01-01 6.1784200000000000