Year Percent 1995-01-01 256.609500000000000 1996-01-01 256.609500000000000 1997-01-01 256.609500000000000 1998-01-01 256.609500000000000 1999-01-01 256.609500000000000 2000-01-01 7.743949000000001 2001-01-01 25.526650000000000 2002-01-01 22.363760000000000 2003-01-01 45.904470000000000 2004-01-01 44.209559999999996 2005-01-01 70.665340000000000 2006-01-01 29.108959999999996 2007-01-01 37.112370000000000 2008-01-01 16.935540000000000 2009-01-01 27.471550000000000 2010-01-01 44.868970000000004 2011-01-01 49.898120000000000 2012-01-01 42.846750000000000 2013-01-01 31.905309999999997 2014-01-01 18.127990000000000