Year current US$ 1974 960000.015795231 1975 29999.999329447703 1976 39999.999105930285 1977 69999.99843537807 1978 70000.00029802331 1979 60000.000521540685 1980 50000.0007450581 1981 39999.9991059303 1982 59999.9986588955 1983 59999.9986588955 1984 70000.0002980232 1985 90000.0035762787 1986 99999.99776482591 1987 120000.0010430813 1988 179999.9959766865 1989 170000.00178813917 1990 8489999.905228617 1991 24040000.297129128 1992 59140000.23156404 1993 53690000.20436938 1994 56230000.5648285 1995 52189999.93801117 1996 34049999.274313435 1997 32979999.795556057 1998 37680000.53614377 1999 27569999.950006653 2000 27749999.61629509 2001 25430000.001564626 2002 22959999.65444206 2003 29489999.17134638 2004 23870000.587776285 2005 230000.004172325 2006 129999.995231628 2007 90000.0035762787 2008 129999.995231628 2009 79999.9982118607 2010 70000.0002980232