Year current US$ 1970 0 1971 240000.000223517 1972 199999.99739229702 1973 239999.99836087198 1974 199999.99739229702 1975 279999.993741512 1976 459999.989718199 1977 459999.98785555403 1978 330000.003799796 1979 1530000.02168119 1980 1349999.97727573 1981 4629999.8536706 1982 7280000.15951693 1983 2800000.06593764 1984 8040000.090375541 1985 6199999.98435378 1986 8639999.90932643 1987 7919999.73915517 1988 25040000.2971292 1989 31149999.769404497 1990 36840000.6722659 1991 47250000.2812594 1992 23950000.5636364 1993 13839999.8825043 1994 10459999.864921 1995 11799999.8517334 1996 11170000.0017881 1997 12969999.937340599 1998 11579999.746754799 1999 13659999.933093801 2000 13060000.181198101 2001 9960000.10147691 2002 13490000.0654161 2003 18399999.6706843 2004 21060000.5276501 2005 165750000.435859 2006 21190000.21182 2007 22460000.263527 2008 25729999.9538809 2009 23719999.9243021 2010 24109999.803826198 2011 35240000.4398078 2012 33839999.5788932 2013 43739999.564364605 2014 73299998.3653426 2015 59890000.680461496 2016 53840001.0019541 2017 42029999.114573 2018 45840000.0166148 2019 44570000.2294034 2020 54669999.437406704 2021 95119998.1980026 2022 31169999.511912443