Year current US$ 1969 339999.999850988 1970 300000.004470348 1971 329999.998211861 1972 270000.003278255 1973 329999.99076128 1974 359999.999403954 1975 420000.001788139 1976 309999.994933605 1977 590000.02220273 1978 329999.998211861 1979 559999.9874830251 1980 519999.995827675 1981 860000.014305115 1982 929999.992251396 1983 1310000.03218651 1984 1249999.97019768 1985 1230000.01907349 1986 1779999.97138977 1987 2080000.0429153398 1988 1159999.98152256 1989 1689999.99761581 1990 3030000.03099442 1991 3310000.03218651 1992 3390000.04157424 1993 4600000.03688037 1994 3630000.03248453 1995 7860000.05528331 1996 7139999.970793719 1997 8670000.00551343 1998 10269999.9734759 1999 12510000.0239909 2000 10899999.961257 2001 12149999.929591998 2002 12690000.0870228 2003 15459999.9152124 2004 13799999.9821186 2005 15090000.0035763 2006 17409999.8474121 2007 16089999.8620152 2008 13659999.9442697 2009 0 2010 0 2011 0 2012 0 2013 0 2014 0 2015 0 2016 0 2017 0 2018 0 2019 0 2020 0 2021 0