Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	-173000000
1981-01-01	-155000000
1982-01-01	-37000000
1983-01-01	-265000000
1984-01-01	153000000
1985-01-01	119000000
1986-01-01	126000000
1987-01-01	67000000
1988-01-01	-566000000
1989-01-01	-106000000
1990-01-01	-368000000
1991-01-01	-208000000
1992-01-01	-1183000000
1993-01-01	-812000000
1994-01-01	-1772000000
1995-01-01	154000000
1996-01-01	276000000
1997-01-01	126000000
1998-01-01	-102000000
1999-01-01	-1301000000
2000-01-01	-3312000000
2001-01-01	-1240000000
2002-01-01	-2645000000
2003-01-01	-3247000000
2004-01-01	-2853000000
2005-01-01	-7975000000
2006-01-01	-6347000000
2007-01-01	-3138000000
2008-01-01	-1634000000
2009-01-01	-8254000000
2010-01-01	-9370000000
2011-01-01	-3402000000
2012-01-01	-8024000000
2013-01-01	-9416000000
2014-01-01	-10096000000