Year current US$ 1960 55.529337122061406 1961 56.328058773770685 1962 55.647806424471085 1963 62.10407789545491 1964 68.77681892518642 1965 100.18084718839715 1966 101.63729963274665 1967 102.96988951289543 1968 106.98635184248866 1969 116.7794526159651 1970 122.08286588506876 1971 133.49157272186292 1972 136.96766814875704 1973 152.68389317385981 1974 183.65600417830032 1975 201.13918696293763 1976 203.17591357971088 1977 237.4008024765355 1978 190.54173044457156 1979 164.39481932574932 1980 93.6922285457737 1981 98.59507365250327 1982 156.8798157240333 1983 157.449155940399 1984 247.34309264383123 1985 234.0391872369222 1986 253.32814246073812 1987 392.47760529315224 1988 394.736136326923 1989 309.8609669270399 1990 244.75407228728133 1991 182.7944662812614 1992 151.97654127814167 1993 165.46503589996374 1994 198.28205131871215 1995 278.3166132198681 1996 284.4568035035247 1997 286.5727449101569 1998 292.16948125344425 1999 257.6785777455168 2000 257.8296057394535 2001 235.85297485356796 2002 241.86893023749434 2003 250.69058841002507 2004 292.472665588666 2005 330.602854382722 2006 346.7684623267853 2007 401.7091876437435 2008 473.3028334315208 2009 799.9296320912291 2010 824.7376711221397 2011 837.095884208132 2012 796.7111394100774 2013 819.7578673384161 2014 897.5097286355696 2015 864.1800592896722 2016 753.6844055080358 2017 766.1776040154422 2018 793.1280822374338 2019 823.0247329028108 2020 846.7672026196202 2021 883.8920261719653 2022 964.3541465266659 2023 1014.2139777315557