Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	10576900000.0000000
1981-01-01	25460800000.0000000
1982-01-01	13296200000.0000000
1983-01-01	-2778800000.0000000
1984-01-01	-2047400000.0000000
1985-01-01	2107699999.9999998
1986-01-01	2112699999.9999998
1987-01-01	-7341900000.0000000
1988-01-01	6289600000.0000000
1989-01-01	1678600000.0000000
1990-01-01	4748000000.0000000
1991-01-01	17091200000.0000000
1992-01-01	25465900000.0000000
1993-01-01	26399900000.0000000
1994-01-01	33367600000.0000000
1995-01-01	5740900000.0000000
1996-01-01	2344200000.0000000
1997-01-01	6062600000.0000000
1998-01-01	16936500000.0000000
1999-01-01	14053000000.0000000
2000-01-01	17313300000.0000000
2001-01-01	21165200000.0000000
2002-01-01	15955400000.0000000
2003-01-01	12780300000.0000000
2004-01-01	11579600000.0000000
2005-01-01	5373800000.0000000
2006-01-01	7889500000.0000000
2007-01-01	14049100000.0000000
2008-01-01	25328600000.0000000
2009-01-01	12335600000.0000000
2010-01-01	28728900000.0000000
2011-01-01	25250800000.0000000
2012-01-01	37496500000.0000000
2013-01-01	52029400000.0000000
2014-01-01	44878800000.0000000
2015-01-01	50911900000.0000000
2016-01-01	36008500000.0000000