Year	current US$
1975	219999.998807907
1976	1220000.02861023
1977	1120000.00476837
1978	289999.99165535
1979	970000.028610229
1980	879999.995231628
1981	1299999.95231628
1982	1570000.05245209
1983	3200000.04768372
1984	1480000.01907349
1985	1279999.97138977
1986	1690000.0572204601
1987	3210000.03814697
1988	1000000
1989	1460000.03814697
1990	1210000.03814697
1991	939999.997615814
1992	1600000.02384186
1993	1649999.97615814
1994	-29999.999329447703
1995	1509999.9904632599