Year current US$ 1968 9999.99977648258 1971 9999.99977648258 1972 29999.999329447703 1973 39999.9991059303 1974 29999.999329447703 1975 19999.9995529652 1976 70000.0002980232 1977 479999.989271164 1978 1220000.02861023 1979 2089999.9141693101 1980 1940000.0572204601 1981 1679999.94754791 1982 1409999.9666214 1983 1120000.00476837 1984 1450000.04768372 1985 1340000.0333786 1986 1450000.04768372 1987 7250000 1988 5150000.09536743 1989 3559999.94277954 1990 3740000.00953674 1991 3109999.89509583 1992 5880000.11444092 1993 2049999.9523162802 1994 12550000.1907349 1995 2140000.10490417 1996 2789999.96185303 1997 2430000.0667572 1998 2440000.05722046 1999 2059999.94277954 2000 7800000.19073486 2001 2700000.04768372 2002 2660000.08583069 2003 3259999.99046326 2004 3400000.09536743 2005 3380000.1144409203 2006 4159999.8474121103 2007 970000.028610229 2008 2170000.07629395 2009 1889999.98569489 2010 1850000.02384186 2011 1600000.02384186 2012 1350000.02384186 2013 1289999.96185303 2014 1000000 2015 1159999.9666214 2016 1529999.97138977 2017 1139999.98569489 2018 1320000.05245209 2019 1210000.03814697 2020 1360000.01430511 2021 1500000 2022 1200000.04768372