Year current US$ 1975 19999.9995529652 1976 29999.999329447703 1977 689999.997615814 1978 529999.971389771 1979 370000.00476837205 1980 170000.00178813902 1981 460000.00834465 1982 589999.973773956 1983 400000.00596046395 1984 349999.99403953605 1985 500000 1986 620000.004768372 1987 779999.971389771 1988 560000.002384186 1989 850000.023841858 1990 910000.026226044 1991 1100000.02384186 1992 1220000.02861023 1993 1620000.00476837 1994 1129999.99523163 1995 1960000.03814697 1996 779999.971389771 1997 1370000.00476837 1998 779999.971389771 1999 1500000 2000 1779999.97138977 2001 1110000.01430511 2002 1389999.98569489 2003 1559999.9427795399 2004 1399999.97615814 2005 1470000.02861023 2006 1009999.99046326 2007 1370000.00476837 2008 340000.00357627904