Year Percent 1995-01-01 16.70090000000000 1996-01-01 7.25327000000000 1997-01-01 20.81420000000000 1998-01-01 47.35320000000000 1999-01-01 43.85860000000000 2000-01-01 47.77800000000000 2001-01-01 51.08110000000000 2002-01-01 68.99700000000000 2003-01-01 90.87200000000001 2004-01-01 115.41600000000000 2005-01-01 103.86399999999999 2006-01-01 76.10670000000000 2007-01-01 56.23930000000000 2008-01-01 52.15450000000000 2009-01-01 62.80780000000000 2010-01-01 82.16450000000000 2011-01-01 93.86850000000000 2012-01-01 98.84960000000000 2013-01-01 82.69180000000000 2014-01-01 64.55880000000000 2015-01-01 55.02310000000000 2016-01-01 44.84500000000000