Year Percent 1983-01-01 2.7302900000000000 1984-01-01 2.7302900000000000 1985-01-01 2.7302900000000000 1986-01-01 2.7302900000000000 1987-01-01 2.7302900000000000 1988-01-01 2.7302900000000000 1989-01-01 0.7262400000000000 1990-01-01 0.5637439999999999 1991-01-01 16.3088000000000000 1992-01-01 0.5321620000000000 1993-01-01 26.4117000000000000 1994-01-01 0.6504460000000000 1995-01-01 1.2739000000000000 1996-01-01 5.9695500000000000 1997-01-01 7.3301700000000000 1998-01-01 10.3645000000000000 1999-01-01 14.1539000000000000 2000-01-01 25.9830000000000000 2001-01-01 23.2477000000000000 2002-01-01 27.9494000000000000 2003-01-01 59.1436000000000000 2004-01-01 108.5790000000000000 2005-01-01 137.3750000000000000 2006-01-01 176.8270000000000000 2007-01-01 203.6420000000000000 2008-01-01 230.7620000000000000 2009-01-01 266.0800000000000000 2010-01-01 512.4930000000000000 2011-01-01 533.8340000000001000 2012-01-01 580.3460000000000000 2013-01-01 630.5090000000000000 2014-01-01 787.6130000000000000 2015-01-01 869.5430000000000000 2016-01-01 748.1450000000000000