Year current US$ 1969 139999.998733401 1970 170000.00178813902 1971 139999.998733401 1972 460000.002756715 1973 880000.002682209 1974 969999.996945262 1975 1619999.9731034 1976 4830000.137910251 1977 2430000.02205372 1978 4690000.01251698 1979 2979999.95946884 1980 6030000.01236796 1981 8629999.78847802 1982 12550000.0305474 1983 14469999.8684227 1984 18359999.958425798 1985 20410000.219941102 1986 16209999.9263883 1987 26650000.732392102 1988 30209999.9561906 1989 24690000.1019239 1990 23719999.819994003 1991 234460002.761334 1992 76909999.1582334 1993 50000000.0745058 1994 43110000.9903312 1995 39650000.0357628 1996 40610000.1782179 1997 42090000.0780821 1998 38749999.8807907 1999 39510000.0649691 2000 32129999.6171147 2001 32829999.975860097 2002 45350000.7726252 2003 31810000.3991276 2004 34880000.4180521 2005 11799999.952316301 2006 10989999.9499321 2007 7630000.00268221 2008 12650000.0059605 2009 17639999.926090203 2010 96889997.4673986 2011 15069999.6948242 2012 21215400.159359 2013 4781722.05388546 2014 22619799.6623814 2015 15505381.8374872 2016 46836859.364062496 2017 30809209.9428177 2018 41701801.3447523 2019 33431694.5753526 2020 30802559.0730831 2021 46723410.204052895 2022 48580400.06458764