Year current US$ 1971 29999.999329447703 1972 29999.999329447703 1973 19999.9995529652 1974 29999.999329447703 1975 70000.0002980232 1976 1210000.03814697 1977 230000.004172325 1978 209999.993443489 1979 109999.999403954 1980 239999.994635582 1981 500000 1982 3049999.95231628 1983 1720000.02861023 1984 5360000.1335144 1985 10289999.961853001 1986 7019999.98092651 1987 13000000 1988 7719999.79019165 1989 10260000.2288818 1990 18049999.237060502 1991 15560000.4196167 1992 2359999.89509583 1993 7380000.11444092 1994 5170000.07629395 1995 6949999.80926514 1996 1860000.01430511 1997 5610000.1335144 1998 4239999.771118159 1999 4449999.80926514 2000 2700000.04768372 2001 1440000.0572204601 2002 3210000.03814697 2003 2480000.01907349 2004 439999.997615814 2005 3640000.10490417 2006 4929999.82833862 2007 2460000.03814697 2008 2200000.04768372 2009 1580000.04291534 2010 2339999.91416931 2011 1919999.95708466 2012 548467.27848053 2013 152105.003595352 2014 2726287.12654114 2015 871985.018253326 2016 3312865.0188446 2017 3125839.94865417 2018 584605.932235718 2019 3098350.04806519 2020 3598187.44659424 2021 2708199.97787476 2022 3802765.84625244