Annual US Dollars, Sum Over Component Sub-periods
1960-01-01 146000000
1961-01-01 50000000
1962-01-01 76000000
1963-01-01 142000000
1964-01-01 177000000
1965-01-01 93000000
1966-01-01 146000000
1967-01-01 120000000
1968-01-01 91000000
1969-01-01 50000000
1970-01-01 4000000
1971-01-01 29000000
1972-01-01 58000000
1973-01-01 68000000
1974-01-01 207000000
1975-01-01 -213000000
1976-01-01 -84000000
1977-01-01 29000000
1978-01-01 52000000
1979-01-01 -37000000
1980-01-01 -13000000
1981-01-01 -450000000
1982-01-01 -538000000
1983-01-01 -420000000
1984-01-01 -409000000
1985-01-01 -530000000
1986-01-01 -711000000
1987-01-01 -1266000000
1988-01-01 -1532000000
1989-01-01 -1735000000
1990-01-01 -1471000000
1991-01-01 -856000000
1992-01-01 -1800000000
1993-01-01 -1414000000
1994-01-01 -2162000000
1995-01-01 -3498000000
1996-01-01 -3922000000
1997-01-01 -3314000000
1998-01-01 -2818000000
1999-01-01 -2759000000
2000-01-01 -2514000000
2001-01-01 -2750000000
2002-01-01 -1569000000
2003-01-01 -1044000000
2004-01-01 2611000000
2005-01-01 5216000000
2006-01-01 10971000000
2007-01-01 16147000000
2008-01-01 19483000000
2009-01-01 12188000000
2010-01-01 6924000000