Year current US$ 1970 70000.0002980232 1971 50000.0007450581 1973 70000.0002980232 1974 100000.00149011599 1975 289999.99165535 1976 400000.00596046395 1977 1799999.95231628 1978 159999.99642372102 1979 250000 1980 50000.0007450581 1981 1230000.01907349 1982 899999.976158142 1983 7019999.98092651 1984 8090000.152587891 1985 15699999.8092651 1986 31010000.2288818 1987 45130001.0681152 1988 49610000.6103516 1989 72290000.9155273 1990 45830001.8310547 1991 32569999.694824196 1992 48779998.779296905 1993 29719999.3133545 1994 17010000.2288818 1995 5500000 1996 13590000.1525879 1997 8729999.54223633 1998 10210000.038146999 1999 1830000.04291534 2000 15210000.038146999 2001 4210000.03814697 2002 150000.005960464 2003 2269999.98092651 2004 5420000.07629395 2005 11649999.6185303 2006 1750000 2007 6260000.228881841 2008 8619999.88555908 2009 19079999.9237061 2010 7190000.05722046 2011 7280000.20980835 2012 6579999.92370605 2013 19129999.1607666 2014 7159999.84741211 2015 16729999.5422363 2016 9949999.80926514 2017 22049999.237060502 2018 11989999.7711182 2019 17909999.8474121 2020 29559999.4659424 2021 32080001.831054702 2022 10300000.1907349