Year current US$ 1975 9999.99977648258 1976 109999.999403954 1977 159999.99642372102 1978 6070000.17166138 1979 1899999.97615814 1980 4119999.88555908 1981 5050000.19073486 1982 4679999.82833862 1983 8550000.19073486 1984 1500000 1985 3700000.04768372 1986 5320000.17166138 1987 8899999.61853027 1988 9810000.4196167 1989 27620000.8392334 1990 12279999.7329712 1991 16469999.3133545 1992 9979999.54223633 1993 9090000.15258789 1994 21920000.0762939 1995 47790000.9155273 1996 38069999.6948242 1997 26049999.237060502 1998 26920000.0762939 1999 25520000.4577637 2000 32180000.305175804 2001 23079999.9237061 2002 17020000.4577637 2003 14050000.1907349 2004 13689999.5803833 2005 23200000.762939498 2006 26739999.7711182 2007 9649999.61853027 2008 34520000.4577637 2009 35509998.3215332 2010 38290000.9155273 2011 44139999.3896484 2012 4519999.98092651 2013 50080001.8310547 2014 24290000.915527303 2015 20959999.084472697 2016 9239999.77111816 2017 19989999.7711182 2018 6469999.79019165 2019 8590000.15258789 2020 8880000.11444092 2021 16309999.465942401 2022 5610000.1335144