Year current US$ 1963 19999.9995529652 1966 59999.9986588955 1967 29999.999329447703 1968 109999.999403954 1969 79999.9982118607 1970 259999.990463257 1971 79999.9982118607 1972 629999.995231628 1973 810000.002384186 1974 2740000.00953674 1975 6130000.11444092 1976 5920000.07629395 1977 1190000.0572204601 1978 1360000.01430511 1979 1899999.97615814 1980 3579999.92370605 1981 2839999.91416931 1982 3410000.08583069 1983 4150000.09536743 1984 4269999.98092651 1985 6030000.20980835 1986 9689999.5803833 1987 7380000.11444092 1988 28430000.3051758 1989 21370000.8392334 1990 19440000.5340576 1991 13800000.1907349 1992 29729999.5422363 1993 26139999.3896484 1994 22239999.7711182 1995 13850000.3814697 1996 10069999.6948242 1997 8010000.22888184 1998 5539999.96185303 1999 5610000.1335144 2000 3490000.00953674 2001 3269999.98092651 2002 6340000.15258789 2003 3920000.07629395 2004 2599999.90463257 2005 19750000 2006 1799999.95231628 2007 -70000.0002980232 2008 -1909999.9666214 2009 5519999.98092651 2010 5000000 2011 11109999.6566772 2012 12930000.3051758 2013 24739999.7711182 2014 17110000.6103516 2015 14050000.1907349 2016 21069999.6948242 2017 15039999.961853001 2018 24549999.237060502 2019 17780000.6866455 2020 12979999.5422363 2021 24989999.7711182 2022 15789999.961853001