Year Percent 1999-01-01 136.6280000000000000 2000-01-01 118.6910000000000000 2001-01-01 100.9540000000000000 2002-01-01 135.6700000000000000 2003-01-01 151.0810000000000200 2004-01-01 251.9709999999999800 2005-01-01 133.6010000000000000 2006-01-01 173.7430000000000000 2007-01-01 171.9140000000000200 2008-01-01 47.3118000000000000 2009-01-01 69.8758000000000000 2010-01-01 95.7522000000000000 2011-01-01 3.6158500000000000 2012-01-01 4.3800900000000000 2013-01-01 4.5431800000000000 2014-01-01 3.4059800000000005 2015-01-01 3.6271800000000000 2016-01-01 3.9225700000000000