Year current US$ 1970 50000.0007450581 1971 59999.9986588955 1972 100000.00149011599 1973 7989999.771118159 1974 7949999.80926514 1975 5630000.11444092 1976 629999.995231628 1977 750000 1978 27950000.762939498 1979 23500000 1980 13079999.923706101 1981 13789999.961853001 1982 23739999.7711182 1983 19110000.6103516 1984 4900000.09536743 1985 41250000 1986 52220001.220703095 1987 41680000.3051758 1988 90589996.3378906 1989 63020000.4577637 1990 40110000.6103516 1991 83150001.5258789 1992 116550003.05175799 1993 90860000.6103516 1994 106309997.558594 1995 78500000 1996 42279998.779296905 1997 43500000 1998 33599998.4741211 1999 59409999.8474121 2000 31930000.3051758 2001 47040000.9155273 2002 68379997.253418 2003 28319999.6948242 2004 14250000 2005 131940002.441406 2006 31530000.6866455 2007 94610000.6103516 2008 37139999.3896484 2009 36639999.3896484 2010 46139999.3896484 2011 46459999.0844727 2012 47819999.6948242 2013 66599998.474121094 2014 50119998.9318848 2015 24350000.3814697 2016 38939998.626709 2017 25350000.3814697 2018 34430000.3051758 2019 45080001.8310547 2020 20159999.8474121 2021 26459999.084472697 2022 17209999.084472697