Year current US$ 1974 790000.021457672 1975 19999.9995529652 1976 550000.011920929 1977 189999.99761581398 1978 1049999.95231628 1979 1019999.98092651 1980 430000.00715255697 1981 1399999.97615814 1982 930000.007152557 1983 1080000.04291534 1984 540000.021457672 1985 2619999.8855590797 1986 3230000.01907349 1987 1669999.95708466 1988 2410000.08583069 1989 2339999.91416931 1990 1500000 1991 1960000.03814697 1992 769999.980926514 1993 639999.985694885 1994 1629999.99523163 1995 3849999.90463257 1996 620000.004768372 1997 1879999.99523163 1998 1600000.02384186 1999 1679999.94754791 2000 479999.989271164 2001 2630000.1144409203 2002 2369999.8855590797 2003 1870000.00476837 2004 1940000.0572204601 2005 6000000 2006 2480000.01907349 2007 1659999.9666214 2008 1870000.00476837 2009 1629999.99523163 2010 3490000.00953674 2011 1820000.05245209 2012 6650000.09536743 2013 9939999.5803833 2014 10399999.6185303 2015 11199999.8092651 2016 14539999.961853001 2017 19549999.237060502 2018 17799999.237060502 2019 15420000.076293899 2020 22459999.084472697 2021 17540000.915527303 2022 17239999.7711182