Year current US$ 1971 39999.9991059303 1972 230000.004172325 1973 720000.028610229 1974 300000.011920929 1975 660000.026226044 1976 180000.00715255702 1977 270000.010728836 1978 59999.9986588955 1979 50000.0007450581 1980 79999.9982118607 1981 50000.0007450581 1982 109999.999403954 1983 39999.9991059303 1984 39999.9991059303 1985 29999.999329447703 1986 90000.0035762787 1987 119999.997317791 1988 150000.005960464 1989 79999.9982118607 1990 330000.013113022 1991 759999.990463257 1992 289999.99165535 1993 59999.9986588955 1994 19999.9995529652 1998 70000.0002980232 1999 79999.9982118607 2000 119999.997317791 2001 150000.005960464 2002 310000.002384186 2003 209999.993443489 2004 469999.998807907 2005 1320000.05245209 2006 200000.00298023198 2007 300000.011920929 2008 519999.980926514 2009 819999.992847443 2010 889999.985694885 2011 1279999.97138977 2012 949999.988079071 2013 1000000 2014 939999.997615814 2015 219999.998807907 2016 1940000.0572204601 2017 2509999.99046326 2018 1649999.97615814 2019 629999.995231628 2020 200000.00298023198 2021 170000.00178813902 2022 360000.01430511504