Year Percent 1995-01-01 0.18452600000000000 1996-01-01 0.29941100000000004 1997-01-01 0.18146199999999998 1998-01-01 0.25436400000000000 1999-01-01 0.21934700000000000 2000-01-01 0.22388500000000000 2001-01-01 0.24294300000000000 2002-01-01 0.25756000000000000 2003-01-01 0.34142100000000003 2004-01-01 0.24204099999999998 2005-01-01 0.30056200000000000 2006-01-01 0.53343100000000000 2007-01-01 0.30752199999999996 2008-01-01 0.43262300000000000 2009-01-01 0.32592400000000000 2010-01-01 0.33869099999999996 2011-01-01 0.42254899999999995 2012-01-01 0.68552300000000000 2013-01-01 0.71289500000000000 2014-01-01 0.41881700000000000 2015-01-01 0.42936100000000000 2016-01-01 0.50802600000000000