Year	current US$
1972	170000.00178813902
1973	400000.00596046395
1974	8759999.541565778
1975	19029999.999329448
1976	31530000.6866455
1977	41169998.1689453
1978	13420000.076293899
1979	5610000.1335144
1980	14949999.8092651
1981	12180000.3051758
1982	9539999.96185303
1983	5260000.228881841
1984	7420000.07629395
1985	5940000.05722046
1986	2869999.8855590797
1987	5719999.79019165
1988	15189999.846741548
1989	10090000.18984083
1990	12449999.84651803
1991	10039999.99910593
1992	10610000.267624846
1993	10139999.542385342
1994	18250000.11920925
1995	5870000.1537799835
1996	3789999.930188058
1997	3340000.0110268556
1998	3010000.0351667423
1999	3189999.96781349
2000	1879999.995231628
2001	1870000.019669532
2002	1849999.9642372143
2003	1669999.9850243325
2004	1899999.9444931746