Year current US$ 1972 90000.0035762787 1973 79999.9982118607 1974 79999.9982118607 1975 109999.999403954 1976 230000.004172325 1977 509999.99046325695 1978 300000.011920929 1979 910000.026226044 1980 689999.997615814 1981 1590000.0333786 1982 899999.976158142 1983 670000.016689301 1984 600000.023841858 1985 1799999.95231628 1986 2799999.95231628 1987 1610000.01430511 1988 1179999.94754791 1989 1240000.0095367401 1990 1259999.9904632599 1991 180000.00715255702 1992 180000.00715255702 1993 2170000.07629395 1994 1600000.02384186 1995 2789999.96185303 1996 3259999.99046326 1997 4019999.98092651 1998 4039999.96185303 1999 4269999.98092651 2000 4389999.8664856 2001 11680000.3051758 2002 9590000.15258789 2003 12670000.076293899 2004 23329999.9237061 2005 22870000.8392334 2006 16979999.5422363 2007 23139999.3896484 2008 32319999.694824196 2009 18309999.4659424 2010 19069999.6948242 2011 19639999.3896484 2012 17190000.5340576 2013 32650001.5258789 2014 27639999.3896484 2015 27030000.6866455 2016 33900001.5258789 2017 30969999.3133545 2018 37060001.373291 2019 30819999.6948242 2020 31379999.1607666 2021 37729999.5422363 2022 33900001.5258789