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 22029999.965801798 1981 19720000.16458334 1982 16500000.027939681 1983 11720000.222325332 1984 13190000.113099819 1985 10989999.987185003 1986 7699999.8278915845 1987 11579999.715089807 1988 23579999.83243644 1989 25530000.07569796 1990 17019999.80211257 1991 17220000.058412552 1992 16410000.219941132 1993 21159999.35567379 1994 20110000.21174547 1995 11900000.071153045 1996 6519999.971613284 1997 5830000.078305606 1998 5359999.969601635 1999 7000000.178813927 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 3783628.8213729803 2017 3273280.0245285 2018 3391657.829284667 2019 4677508.652210233 2020 788064.301013947 2021 2575419.962406157 2022 732600.018382072