Year current US$ 1970 39999.9991059303 1971 19999.9995529652 1972 240000.00208616222 1973 450000.0067055221 1974 8789999.540895225 1975 21190000.010654334 1976 34050000.7495284 1977 43389998.12677501 1978 16650000.071153002 1979 13980000.324547287 1980 22089999.964460693 1981 19720000.16458334 1982 16500000.027939681 1983 11770000.22307039 1984 13230000.11220575 1985 11009999.986737968 1986 7699999.8278915845 1987 11579999.715089807 1988 23579999.83243644 1989 25860000.08881098 1990 17579999.804496754 1991 18100000.06854534 1992 19650000.11026858 1993 24329999.312758446 1994 22780000.28803942 1995 13380000.090226537 1996 7759999.9811500255 1997 6710000.073537234 1998 5869999.960064891 1999 7910000.205039972 2000 9059999.942779537 2001 18349999.80032444 2002 16009999.915957443 2003 13869999.911636114 2004 13960000.334307555 2005 3579999.998211862 2006 1779999.9751150613 2007 4799999.989569191 2008 5109999.977052205 2009 5940000.055357818 2010 4039999.9544024486 2011 9340000.063180923 2012 4906000.0889003305 2013 6342715.032398697 2015 4923613.3992672 2016 4759858.906269068 2017 4340049.98207092 2018 3391657.829284667 2019 4679188.8722218545 2020 788064.301013947 2021 2575419.962406157 2022 732600.018382072