Year current US$ 1966 9999.99977648258 1967 19999.9995529652 1968 19999.9995529652 1969 19999.9995529652 1970 100000.00149011599 1971 200000.00298023198 1972 980000.019073486 1973 1370000.00476837 1974 2250000 1975 2509999.99046326 1976 2039999.96185303 1977 1240000.0095367401 1978 3569999.9332428 1979 13340000.1525879 1980 8149999.61853027 1981 7300000.19073486 1982 9760000.22888184 1983 7280000.20980835 1984 7369999.88555908 1985 9069999.69482422 1986 12109999.6566772 1987 11970000.2670288 1988 29430000.3051758 1989 11380000.1144409 1990 10100000.3814697 1991 16170000.076293899 1992 18610000.6103516 1993 8649999.61853027 1994 9060000.4196167 1995 8069999.694824221 1996 7179999.82833862 1997 6010000.228881841 1998 6130000.11444092 1999 6909999.84741211 2000 8319999.694824221 2001 5880000.11444092 2002 8630000.11444092 2003 11399999.6185303 2004 16180000.3051758 2005 16500000 2006 17069999.6948242 2007 22739999.7711182 2008 29909999.8474121 2009 23520000.4577637 2010 30829999.9237061 2011 26180000.3051758 2012 27690000.5340576 2013 29170000.0762939 2014 37549999.237060495 2015 24309999.4659424 2016 18000000 2017 31709999.084472697 2018 43939998.626709 2019 39709999.0844727 2020 36549999.237060495 2021 49560001.373291 2022 49759998.3215332