Year	current US$
1961	-29456004.712960754
1962	-30576004.892160773
1963	-37408005.98528096
1964	-48832007.81312125
1965	-68656010.98496176
1966	-91280014.60480234
1967	-98336015.73376252
1968	-102928016.46848263
1969	-148736023.7977638
1970	-228928036.62848586
1971	-264625072.7832543
1972	-146340590.0802238
1973	130660660.06356925
1974	103349381.1955801
1975	-83912013.85534361
1976	15009832.153348796
1977	-21227988.597537555
1978	-67848926.19106393
1979	-2528812.50201965
1980	-258143129.2533229
1981	-512209513.9880559
1982	-560492269.0254558
1983	-442147663.2071433
1984	-349785209.9822826
1985	-250221430.47083217
1986	-205885441.2227948
1987	-204538059.85026968
1988	-317050976.12256694
1989	-429088597.18885833
1990	-267944426.65125987
1991	-374579831.9327731
1992	94028612.89653742
1993	780866721.1774325
1994	757543781.0945275
1995	803799281.5446789
1996	567376176.0242792
1997	-44080468.58656998
1998	197886514.83513817
1999	355698424.57660496
2000	596334671.5856481
2001	402984648.6678719
2002	87361083.94667764
2003	544142865.1827673
2004	520159449.97982436