Year current US$ 1970 345.9242024127139 1971 343.42633132288535 1972 382.5592816827823 1973 385.1626757400838 1974 411.76974377150896 1975 429.4981265206811 1976 416.7555684364234 1977 400.31673993710393 1978 401.44191140951955 1979 375.0534729538115 1980 345.9547863501004 1981 476.03708282035933 1982 501.1285674964294 1983 487.4233167170841 1984 406.2022438179566 1985 415.46954419668265 1986 370.32719101849955 1987 486.74007001738454 1988 453.3171327495505 1989 578.2193198468185 1990 651.4165865234661 1991 672.6033650898921 1992 575.1363483075365 1993 582.7046220444246 1994 562.1260357013948 1995 590.9258875553852 1996 616.3095583146187 1997 600.5517883431759 1998 499.15431029411724 1999 480.2140619340039 2000 317.94769095794095 2001 328.15129196548816 2002 363.0564661089904 2003 420.7908925355976 2004 432.1944703229881 2005 463.70226316930575 2006 448.8974905316607 2007 519.2179347596235 2008 640.0481741946212 2009 582.8772687761591 2010 599.8599679459033 2011 719.1187657506122 2012 634.961809599423 2013 653.6185323405443 2014 651.2045317409835 2015 644.1790638907491 2016 678.6802794927376 2017 781.975888258504 2018 807.3610000841503 2019 754.3816394204954 2020 754.2706940116295 2021 836.870024795178 2022 814.111990051955 2023 914.2751538041039