Year current US$ 1968 50000.0007450581 1969 419999.986886978 1970 439999.997615814 1971 589999.973773956 1972 899999.976158142 1973 610000.014305115 1974 620000.004768372 1975 1240000.0095367401 1976 1259999.9904632599 1977 779999.971389771 1978 1090000.0333786 1979 1139999.98569489 1980 1049999.95231628 1981 1529999.97138977 1982 1379999.99523163 1983 779999.971389771 1984 829999.983310699 1985 340000.00357627904 1986 1179999.94754791 1987 629999.995231628 1988 1529999.97138977 1989 1059999.9427795399 1990 1039999.96185303 1991 870000.004768372 1992 629999.995231628 1993 19999.9995529652 1994 79999.9982118607 1995 109999.999403954 1996 100000.00149011599 1997 310000.002384186 1998 389999.98569488496 1999 270000.010728836 2000 189999.99761581398 2001 140000.000596046 2002 90000.0035762787 2003 109999.999403954 2004 1169999.95708466 2005 2009999.9904632599 2006 2789999.96185303 2007 2349999.90463257 2008 2250000 2009 3259999.99046326 2010 2670000.07629395 2011 70000.0002980232 2012 280861.884355545 2013 134277.001023293 2014 428637.41517067 2015 606057.345867157 2016 2321755.40924072 2017 1634334.92183685 2018 616459.310054779 2019 1267652.0347595199 2020 1576065.30189514 2021 1468021.0351944 2022 2730787.9924774203