Year	US Dollars, Sum Over Component Sub-periods
1975-01-01	-2150400000
1976-01-01	-1142700000
1977-01-01	-127200000
1978-01-01	648600000
1979-01-01	-165200000
1980-01-01	-1449800000
1981-01-01	-417200000
1982-01-01	-889500000
1983-01-01	-1050300000
1984-01-01	38600000
1985-01-01	-736000000
1986-01-01	-675400000
1987-01-01	-1714900000
1988-01-01	-2700000000
1989-01-01	-5776400000
1990-01-01	-6977700000
1991-01-01	-6713100000
1992-01-01	-5084400000
1993-01-01	-1122500000
1994-01-01	1091700000
1995-01-01	5515300000
1996-01-01	5019700000
1997-01-01	6430400000
1998-01-01	6713000000
1999-01-01	6961700000
2000-01-01	9473700000
2001-01-01	10420500000
2002-01-01	11450300000
2003-01-01	7938400000
2004-01-01	11725600000
2005-01-01	6557200000
2006-01-01	8649100000
2007-01-01	10497300000
2008-01-01	7098400000
2009-01-01	4235000000
2010-01-01	3588400000
2011-01-01	-3936100000
2012-01-01	-3528500000
2013-01-01	-2758300000