Year current US$ 1967 9999.99977648258 1968 9999.99977648258 1970 9999.99977648258 1971 19999.9995529652 1972 29999.999329447703 1973 9999.99977648258 1974 9999.99977648258 1975 9999.99977648258 1976 19999.9995529652 1977 29999.999329447703 1978 50000.0007450581 1979 39999.9991059303 1980 209999.993443489 1981 460000.00834465 1982 159999.99642372102 1983 419999.986886978 1984 250000 1985 1649999.97615814 1986 170000.00178813902 1987 469999.998807907 1988 509999.99046325695 1989 409999.99642372096 1990 10550000.1907349 1991 629999.995231628 1992 899999.976158142 1993 1519999.98092651 1994 1919999.95708466 1995 5320000.17166138 1996 1750000 1997 2819999.9332428 1998 8590000.15258789 1999 2119999.8855590797 2000 6730000.01907349 2001 3529999.97138977 2002 2140000.10490417 2003 6639999.8664856 2004 8140000.34332275 2005 13319999.6948242 2006 14850000.3814697 2007 15000000 2008 17030000.6866455 2009 22159999.8474121 2010 28299999.237060502 2011 14159999.8474121 2012 21559999.4659424 2013 15680000.3051758 2014 24170000.0762939 2015 16799999.237060502 2016 18389999.3896484 2017 22340000.1525879 2018 26139999.3896484 2019 34049999.237060495 2020 23500000 2021 49689998.626709 2022 21430000.3051758