Year current US$ 1969 39999.9991059303 1970 160000.000149012 1971 259999.99232590199 1972 159999.994561076 1973 210000.006482005 1974 2309999.89807606 1975 26609999.8950958 1976 27509999.9308586 1977 18460000.321268998 1978 40399999.1193414 1979 107940000.534058 1980 151279998.272657 1981 98810002.4238229 1982 77259999.92713329 1983 60710001.0067225 1984 59139998.793602 1985 51360000.4315376 1986 50610000.193119 1987 48710000.038147 1988 52310000.2408028 1989 60589999.675750695 1990 60819999.6948242 1991 98309999.704361 1992 109350001.21593499 1993 95839998.3346462 1994 57049998.9390373 1995 55270000.785589196 1996 13410000.026225999 1997 10870000.0494719 1998 7710000.06049871 1999 6419999.83787537 2000 17430000.200867698 2001 27619999.691844 2002 24330000.4675984 2003 19959999.9897182 2004 0 2005 7110000.09253621 2006 1469999.97831881 2007 12410000.0131875 2008 12709999.7680634 2009 9650000.11771917 2010 10609999.759122701 2011 22120000.4555285 2012 13340799.722820502 2013 6113522.7978229495 2014 0 2015 5923874.88484383 2016 13896064.2814636 2017 17494510.3526115 2018 16093721.866607701 2019 11380700.1709938 2020 25684680.7636321 2021 23266970.2172279 2022 11882200.002670279