Year current US$ 1971 39999.9991059303 1972 50000.0007450581 1973 29999.999329447703 1974 29999.999329447703 1975 9999.99977648258 1976 29999.999329447703 1978 19999.9995529652 1980 2019999.9809265102 1981 209999.993443489 1982 -200000.00298023198 1983 -170000.00178813902 1984 -159999.99642372102 1985 -180000.00715255702 1986 -109999.999403954 1987 560000.002384186 1988 5460000.03814697 1989 1240000.0095367401 1990 18910000.380128585 1991 91929995.91305847 1992 11390000.09000301 1993 10180000.320076935 1994 17899999.774992477 1995 22489999.8623878 1996 36209999.12545086 1997 33690000.394359194 1998 37150000.30398373 1999 51009999.37206502 2000 35449999.80181454 2001 36160000.462085046 2002 31660000.21807847 2003 36499999.68148765 2004 77229998.73943636 2005 17430000.24743378 2006 21500000.113621354 2007 16719999.872148033 2008 32359999.23199417 2009 26940000.154078044 2010 25810000.013560046 2011 25950000.049546376 2012 20770000.040531166 2013 20449999.975040562 2014 29260000.11339783 2015 26959999.918937694 2016 24760000.588372342 2017 28150000.02831224 2018 19300000.20936131 2019 30449999.891221527 2020 19259999.85635281 2021 17520000.047981773 2022 65520001.01096922