Year Percent 1993-01-01 0.109507000000000 1994-01-01 17.541700000000000 1995-01-01 14.305700000000000 1996-01-01 12.817400000000000 1997-01-01 12.370800000000000 1998-01-01 11.862300000000000 1999-01-01 12.434600000000000 2000-01-01 12.506700000000000 2001-01-01 13.050999999999998 2002-01-01 12.000400000000000 2003-01-01 12.380400000000000 2004-01-01 13.538700000000000 2005-01-01 11.507600000000000 2006-01-01 10.488200000000000 2007-01-01 12.279400000000000 2008-01-01 9.237750000000000 2009-01-01 9.380080000000000 2010-01-01 10.143800000000000 2011-01-01 7.619940000000000 2012-01-01 9.952850000000000 2013-01-01 6.789710000000000 2014-01-01 5.742180000000000 2015-01-01 5.878750000000000 2016-01-01 7.402900000000000