Year Percent 1995-01-01 26.749400000000000 1996-01-01 19.907200000000000 1997-01-01 42.137200000000000 1998-01-01 22.426500000000000 1999-01-01 40.900300000000000 2000-01-01 46.065100000000000 2001-01-01 28.939000000000000 2002-01-01 41.288700000000000 2003-01-01 33.132800000000000 2004-01-01 33.944800000000000 2005-01-01 27.557600000000000 2006-01-01 22.030500000000000 2007-01-01 30.508400000000000 2008-01-01 23.757300000000000 2009-01-01 12.256100000000000 2010-01-01 11.035700000000000 2011-01-01 26.969700000000000 2012-01-01 23.674800000000000 2013-01-01 17.084600000000000 2014-01-01 8.869860000000001 2015-01-01 18.335600000000000 2016-01-01 13.382400000000000