Year Percent 1993-01-01 0.62237400000000000 1994-01-01 0.48915600000000004 1995-01-01 0.53319400000000000 1996-01-01 0.58278200000000000 1997-01-01 0.56784899999999990 1998-01-01 0.58102700000000010 1999-01-01 0.59414100000000000 2000-01-01 0.52310700000000000 2001-01-01 0.53135200000000000 2002-01-01 0.65353900000000000 2003-01-01 0.70348400000000000 2004-01-01 0.60756400000000000 2005-01-01 0.58512100000000000 2006-01-01 0.56564100000000000 2007-01-01 0.55862800000000000 2008-01-01 0.60949100000000000 2009-01-01 0.74820100000000000 2010-01-01 0.70475700000000000 2011-01-01 0.71116400000000000 2012-01-01 0.73023300000000000 2013-01-01 0.78570400000000000 2014-01-01 0.80509800000000000 2015-01-01 0.88068300000000000 2016-01-01 0.81450200000000010