Year current US$ 1969 439999.997615814 1970 469999.998807907 1971 409999.99642372096 1972 310000.002384186 1973 479999.989271164 1974 479999.989271164 1975 330000.013113022 1976 479999.989271164 1977 819999.992847443 1978 629999.995231628 1979 829999.983310699 1980 209999.993443489 1981 1029999.97138977 1982 759999.990463257 1983 1230000.01907349 1984 980000.019073486 1985 1360000.01430511 1986 1600000.02384186 1987 1600000.02384186 1988 980000.019073486 1989 2150000.09536743 1990 1370000.00476837 1991 2099999.90463257 1992 1440000.0572204601 1993 2210000.03814697 1994 2029999.97138977 1995 4019999.98092651 1996 1830000.04291534 1997 2319999.9332428 1998 1720000.02861023 1999 2680000.0667572 2000 2410000.08583069 2001 2789999.96185303 2002 1809999.9427795399 2003 3170000.07629395 2004 1450000.04768372 2005 2380000.1144409203 2006 1389999.98569489 2007 2450000.04768372 2008 1289999.96185303