Year current US$ 1977 610000.014305115 1978 500000 1979 23700000.762939498 1980 12720000.2670288 1981 9640000.34332275 1982 8020000.45776367 1983 6760000.228881841 1984 6639999.8664856 1985 5369999.88555908 1986 4789999.96185303 1987 4860000.1335144 1988 5480000.01907349 1989 7119999.88555908 1990 6880000.11444092 1991 9409999.84741211 1992 5570000.17166138 1993 3680000.0667572 1994 3259999.99046326 1995 639999.985694885 1996 1049999.95231628 1997 779999.971389771 1998 610000.014305115 1999 589999.973773956 2000 400000.00596046395 2001 610000.014305115 2003 1110000.01430511 2005 910000.026226044 2006 270000.010728836 2007 1870000.00476837 2008 2660000.08583069 2009 2140000.10490417 2010 3049999.95231628 2011 6980000.01907349 2012 530600.011348724 2013 4131261.8255615197 2017 5586540.22216797 2018 5640707.01599121 2019 3085984.70687866 2020 7441562.17575073 2021 6647620.20111084 2022 3200799.9420165997