Year current US$ 1970 1259999.9904632599 1971 1340000.0333786 1972 1820000.05245209 1973 2130000.1144409203 1974 1759999.9904632599 1975 3480000.01907349 1976 3910000.08583069 1977 3869999.8855590797 1978 3220000.02861023 1979 4349999.90463257 1980 4090000.1525878897 1981 2220000.02861023 1982 9909999.84741211 1983 2869999.8855590797 1984 3119999.8855590797 1985 2880000.1144409203 1986 3759999.99046326 1987 4690000.05722046 1988 17389999.3896484 1989 13109999.6566772 1990 15000000 1991 4969999.79019165 1992 3869999.8855590797 1993 5659999.84741211 1994 8770000.45776367 1995 1769999.98092651 1996 11960000.038146999 1997 7980000.01907349 1998 10359999.6566772 1999 7010000.228881841 2000 4309999.94277954 2001 13199999.8092651 2002 7489999.771118159 2003 10850000.3814697 2004 11560000.4196167 2005 17540000.915527303 2006 18959999.084472697 2007 2579999.92370605 2008 579999.983310699 2009 119999.997317791 2010 170000.00178813902