Year current US$ 1970 16766.1086909912 1971 0 1972 0 1973 18204.1229922606 1974 141790.117203163 1975 44270.4017731055 1976 76433.7239284424 1977 212294.214362422 1978 259086.754509492 1979 338640.095223942 1980 358071.119960153 1981 236537.444556129 1982 188924.656682436 1983 212817.732024627 1984 938655.459088242 1985 157187.269632292 1986 0 1987 0 1988 0 1989 0 1990 0 1991 0 1992 0 1993 0 1994 0 1995 105379.384521444 1996 0 1997 1711817.47536277 1998 1399962.50090463 1999 19223.1454895852 2000 37653.0398546063 2001 41982.6297423519 2002 70698.479703189 2003 27684.3997147115 2004 595270.447971483 2005 6930013.43382178 2006 10164382.8616018 2007 15079374.8474838 2008 12848006.1503691 2009 13394618.6141617 2010 17729968.5557652 2011 30346801.0326719 2012 24867401.6600342 2013 11497622.6234982 2014 5999145.62863267 2015 7497715.57088976 2016 7896639.81720013 2017 6390475.78812162 2018 43150318.6713923 2019 9152471.45786096 2020 21165854.9582776 2021 95956219.8057281