Year current US$ 1974 9999.99977648258 1976 39999.9991059303 1978 79999.9982118607 1979 139999.9968707562 1980 59999.998658895485 1981 79999.99821186058 1982 59999.99865889553 1983 159999.99642372126 1984 99999.99776482579 1985 159999.99828636646 1986 130000.00081956378 1987 209999.99530613422 1988 69999.9984353781 1989 49999.9988824129 1990 1159999.9815225594 1991 209999.99530613434 1992 329999.9963492155 1993 459999.99903142423 1994 1360000.0031292425 1995 2760000.0072270627 1996 3249999.9776482573 1997 3779999.9620765443 1998 1999999.9478459354 1999 3440000.0032037464 2000 4079999.9460577955 2001 3969999.9913573302 2002 6179999.927058814 2003 6199999.939650303 2004 7809999.968856573 2005 17540000.39584935 2006 20529999.75346029 2007 39669999.38525256 2008 44659999.9442697 2009 26849999.468773577 2010 25199999.47398903 2011 22699999.313801542 2012 23929999.258369166 2013 22769999.232143126 2014 23859999.336302243 2015 16370000.515133137 2016 17740000.177174825 2017 18390000.289306045 2018 20319999.26827845 2019 18989999.54946339 2020 17280000.30480325 2021 14099999.709054831 2022 20590000.0911206