Year	constant 2021 US$
1974	10260000.2288818
1975	6949999.80926514
1976	9699999.80926514
1977	6679999.82833862
1978	11819999.6948242
1979	2309999.94277954
1980	3710000.03814697
1981	2660000.08583069
1982	1490000.0095367401
1983	970000.028610229
1984	920000.016689301
1985	159999.99642372102
1986	4289999.96185303
1987	4139999.8664856004
1988	22100000.3814697
1989	2289999.96185303
1990	4769999.98092651
1991	-409999.99642372096
1992	79999.9982118607
1993	-529999.971389771
1994	-1389999.98569489
1995	-660000.026226044
1996	-2549999.95231628
1997	-5369999.88555908
1998	419999.986886978
1999	4750000
2000	-6289999.96185303
2001	-1370000.00476837
2002	-2920000.07629395
2003	-1950000.04768372
2004	529999.971389771