Year	current US$
1970	17640000.90956684
1971	9600000.3516674
1972	9020000.10013581
1973	11529999.911785144
1974	8490000.247955326
1975	9339999.91416931
1976	7519999.98092651
1977	6690000.176429745
1978	7560000.061988828
1979	1380000.054836269
1980	1450000.04768372
1981	1790000.0289082532
1982	909999.9777972699
1983	370000.0047683713
1984	199999.98807907093
1985	589999.973773957
1986	319999.992847442
1987	1180000.007152557
1988	939999.9678134879
1989	990000.0393390614
1990	2159999.992698434
1991	3810000.101104372
1992	6249999.966472378
1993	11070000.171661379
1994	8149999.946355818
1995	11720000.17762184
1996	10999999.999999989
1997	10610000.059008598
1998	8060000.121593479
1999	4650000.0059604645
2000	2909999.9293684945
2001	3140000.008046629
2002	5080000.139772892
2003	2889999.898150568
2004	110000.00312924391