Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	-1229000000
1981-01-01	-4425000000
1982-01-01	-1101000000
1983-01-01	-3551000000
1984-01-01	-1580000000
1985-01-01	-989000000
1986-01-01	874000000
1987-01-01	-4401000000
1988-01-01	-874000000
1989-01-01	-1114000000
1990-01-01	-1345000000
1991-01-01	-395000000
1992-01-01	4387000000
1993-01-01	-3038000000
1994-01-01	-4904000000
1995-01-01	-2432800000
1996-01-01	-5969400000
1997-01-01	3575800000
1998-01-01	1359400000
1999-01-01	-3242600000
2000-01-01	4894600000
2001-01-01	391700000
2002-01-01	1719500000
2003-01-01	22300000
2004-01-01	-5278600000
2005-01-01	5824600000
2006-01-01	-4110000000
2007-01-01	-18808600000
2008-01-01	-18704900000
2009-01-01	20977000000
2010-01-01	-27005300000
2011-01-01	-3673500000
2012-01-01	-6274000000
2013-01-01	-27278800000
2014-01-01	-20910300000
2015-01-01	-12852600000
2016-01-01	-24438500000