Year current US$ 1960 29999.999329447703 1961 39999.9991059303 1962 39999.9991059303 1963 79999.9982118607 1964 129999.995231628 1965 280000.001192093 1967 259999.990463257 1968 209999.993443489 1969 100000.00149011599 1970 29999.999329447703 1971 1740000.0095367401 1972 779999.971389771 1973 3359999.89509583 1974 3799999.95231628 1975 9329999.92370605 1976 9029999.73297119 1977 11670000.076293899 1978 13680000.3051758 1979 35369998.9318848 1980 23110000.6103516 1981 22729999.5422363 1982 25209999.084472697 1983 28260000.2288818 1984 32299999.2370605 1985 33259998.321533203 1986 23969999.3133545 1987 19940000.5340576 1988 7179999.82833862 1989 6289999.96185303 1990 10569999.6948242 1991 13430000.3051758 1992 12109999.6566772 1993 11989999.7711182 1994 8510000.22888184 1995 12359999.6566772 1996 12470000.2670288 1997 13880000.1144409 1998 12890000.3433228 1999 14260000.2288818 2000 16690000.534057599 2001 18270000.4577637 2002 15029999.7329712 2003 13489999.7711182 2004 22950000.762939498 2005 51720001.220703095 2006 20559999.4659424 2007 23069999.6948242 2008 15489999.7711182 2009 18309999.4659424 2010 11050000.1907349 2011 12949999.8092651 2012 4780000.20980835 2013 3789999.96185303 2014 6369999.88555908 2015 1799999.95231628 2016 2240000.00953674 2017 2170000.07629395 2018 2039999.96185303 2019 2559999.94277954 2020 2029999.97138977 2021 2609999.89509583 2022 2910000.08583069