Year	US Dollars, Sum Over Component Sub-periods
1979-01-01	-130000000
1980-01-01	-343000000
1981-01-01	-415000000
1982-01-01	-369000000
1983-01-01	-670000000
1984-01-01	403000000
1985-01-01	-405000000
1986-01-01	56000000
1987-01-01	-806000000
1988-01-01	-833000000
1989-01-01	-775000000
1990-01-01	-328000000
1991-01-01	875000000
1992-01-01	-1386000000
1993-01-01	-1111000000
1994-01-01	334000000
1995-01-01	2207000000
1996-01-01	-1800000000
1997-01-01	-3255000000
1998-01-01	-4256000000
1999-01-01	193000000
2000-01-01	2637000000
2001-01-01	-531000000
2002-01-01	-66000000
2003-01-01	-793000000
2004-01-01	-1912000000
2005-01-01	-201000000
2006-01-01	-95000000
2007-01-01	-3152000000
2008-01-01	1804000000
2009-01-01	-347000000
2010-01-01	-3538000000
2011-01-01	-1271000000
2012-01-01	3138000000
2013-01-01	947000000
2014-01-01	3722000000