Year current US$ 1968 829999.983310699 1969 1120000.00476837 1970 1159999.9666214 1971 1370000.00476837 1972 1549999.95231628 1973 1379999.99523163 1974 819999.992847443 1975 870000.004768372 1976 810000.002384186 1977 800000.011920929 1978 550000.011920929 1979 1110000.01430511 1980 1309999.9427795399 1981 1559999.9427795399 1982 1169999.95708466 1983 540000.021457672 1984 340000.00357627904 1985 409999.99642372096 1986 409999.99642372096 1987 699999.988079071 1988 639999.985694885 1989 289999.99165535 1990 439999.997615814 1991 479999.989271164 1992 360000.01430511504 1993 639999.985694885 1994 430000.00715255697 1995 79999.9982118607 1996 70000.0002980232 1997 79999.9982118607 1998 79999.9982118607 1999 319999.99284744303 2000 29999.999329447703 2001 1259999.9904632599 2002 -1029999.97138977 2004 8319999.694824221