Year current US$ 1976 2890000.10490417 1977 2250000 1978 1970000.02861023 1979 2339999.91416931 1980 2930000.0667572 1981 2660000.08583069 1982 3359999.89509583 1983 2299999.95231628 1984 3490000.00953674 1985 1730000.01907349 1986 1559999.9427795399 1987 11670000.076293899 1988 10079999.923706101 1989 579999.983310699 1990 879999.995231628 1991 819999.992847443 1992 430000.00715255697 1993 100000.00149011599 1994 860000.014305115 1995 29999.999329447703 2010 39999.9991059303 2011 50000.0007450581 2012 29999.999329447703 2013 0 2015 39999.9991059303 2018 59999.9986588955 2019 59999.9986588955 2020 19999.9995529652 2021 29999.999329447703 2022 9999.99977648258