Year Percent 1995-01-01 56.70130000000000 1996-01-01 56.01420000000000 1997-01-01 74.66770000000000 1998-01-01 119.62100000000001 1999-01-01 104.05300000000000 2000-01-01 79.73190000000000 2001-01-01 69.43230000000000 2002-01-01 56.36560000000000 2003-01-01 25.28810000000000 2004-01-01 29.98070000000000 2005-01-01 21.08180000000000 2006-01-01 50.05940000000000 2007-01-01 38.43960000000000 2008-01-01 25.36940000000000 2009-01-01 16.46950000000000 2010-01-01 14.13820000000000 2011-01-01 13.48650000000000 2012-01-01 9.84705000000000 2013-01-01 23.55020000000000 2014-01-01 21.20400000000000 2015-01-01 24.65030000000000 2016-01-01 21.84930000000000