Year current US$ 1981 109999.999403954 1982 70000.0002980232 1983 70000.0002980232 1984 9999.99977648258 1985 19999.9995529652 1986 29999.999329447703 1987 9999.99977648258 1988 9999.99977648258 1989 9999.99977648258 1990 9999.99977648258 1991 569999.992847443 1992 449999.988079071 1993 3049999.95231628 1994 1399999.97615814 1995 750000 1996 1000000 1997 519999.980926514 1998 79999.9982118607 1999 360000.01430511504 2000 870000.004768372 2001 300000.011920929 2002 490000.009536743 2003 2230000.01907349 2004 1029999.97138977 2005 529999.971389771 2006 649999.976158142 2007 250000 2008 -340000.00357627904 2009 -1179999.94754791 2010 -1080000.04291534 2011 -1100000.02384186 2012 -980000.019073486 2013 -1019999.98092651 2014 -930000.007152557 2015 -759999.990463257 2016 -759999.990463257 2017 -790000.021457672 2018 -829999.983310699 2019 -270000.010728836 2020 -50000.0007450581 2021 170000.00178813902 2022 19999.9995529652