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	124969997.55129243
1991	34320000.493899
1992	46989999.97600908
1993	51160000.08583071
1994	47940000.861883156
1995	57399999.52912328
1996	59199999.481439546
1997	61860000.05900856
1998	47010000.407695755
1999	31579999.238252655
2000	24320000.253617756
2001	25870000.02712011
2002	30699999.548494823
2003	18649999.530985948
2004	13890000.451356174
2005	1820000.05245209
2006	310000.002384186
2007	1049999.95231628
2008	1409999.9666214
2009	1870000.00476837
2010	1049999.95231628