Year Percent 1993-01-01 14.143700000000000 1994-01-01 14.477400000000000 1995-01-01 10.903900000000000 1996-01-01 6.701239999999999 1997-01-01 8.087270000000000 1998-01-01 11.570300000000000 1999-01-01 14.206500000000000 2000-01-01 16.475900000000000 2001-01-01 21.820300000000000 2002-01-01 27.488200000000000 2003-01-01 33.183000000000000 2004-01-01 41.102600000000000 2005-01-01 52.088300000000000 2006-01-01 66.212200000000000 2007-01-01 71.667100000000000 2008-01-01 83.378300000000000 2009-01-01 83.378300000000000 2010-01-01 94.497400000000000 2011-01-01 82.324400000000000 2012-01-01 69.152100000000000 2013-01-01 60.267100000000000 2014-01-01 54.190700000000000 2015-01-01 49.721300000000000 2016-01-01 47.421100000000000