Year current US$ 1974 9999.99977648258 1975 0 1976 59999.9986588955 1977 19999.9995529652 1978 99999.99776482579 1979 229999.996721745 1980 109999.997541308 1981 139999.996870756 1982 99999.99776482579 1983 179999.995976686 1984 139999.996870756 1985 139999.998733401 1986 409999.99642372096 1987 450000.001117587 1988 59999.9986588955 1989 49999.998882412896 1990 209999.995306134 1991 629999.9989569191 1992 549999.991431832 1993 539999.989792705 1994 1310000.00052154 1995 7980000.02279878 1996 16779999.8279661 1997 12909999.795258 1998 10080000.0317395 1999 12180000.2194941 2000 12710000.0400096 2001 13770000.1690537 2002 27710000.4516542 2003 40849999.9716878 2004 36280000.2656877 2005 45830000.415444404 2006 47230000.6393343 2007 55180000.880733095 2008 63029998.9953637 2009 40699999.6174127 2010 23070000.488311097 2011 31090000.2811104 2012 18119999.6415526 2013 19670000.0371784 2014 19479999.795556102 2015 19470000.3452599 2016 25530000.211671 2017 33380000.170320302 2018 27709999.8462945 2019 32789999.3229657 2020 31909999.795258 2021 31300000.222399797 2022 31440000.29191374