Year current US$ 1960 171.5457060271849 1961 167.25194293584724 1962 166.82540149457398 1963 179.9798480282227 1964 199.63706059437246 1965 214.0696790513919 1966 211.69268810290407 1967 215.56228022757278 1968 222.5519769608327 1969 241.94135760961987 1970 257.4849816360082 1971 272.9822395725336 1972 300.6592979966357 1973 371.15278857065596 1974 453.2414490252093 1975 488.9828217062204 1976 517.4578689154897 1977 577.0436553154855 1978 608.4973409560458 1979 727.2622412403838 1980 867.3051826300117 1981 914.4760656633363 1982 870.2219313724905 1983 878.263036819272 1984 895.2951828013148 1985 905.3346257137366 1986 904.3903625808094 1987 904.991004626364 1988 946.5952819777115 1989 935.1069458746284 1990 1030.882088127089 1991 982.098217405714 1992 1016.1666601432613 1993 1086.6137005768408 1994 1181.106775788084 1995 1319.4596480609052 1996 1420.8427955635857 1997 1486.5646922454814 1998 1427.5064423540498 1999 1372.911883331096 2000 1475.929267902326 2001 1478.9669080661834 2002 1484.0865629431155 2003 1648.564485320518 2004 1942.243649876648 2005 2295.2476828409776 2006 2693.979790863799 2007 3312.288963225801 2008 3933.928423487007 2009 3775.9654002342836 2010 4545.565052997713 2011 5326.060997882714 2012 5601.060782669168 2013 5844.933202298815 2014 5978.090347635738 2015 5541.33759395986 2016 5528.045430695707 2017 6048.219172943168 2018 6378.538854110535 2019 6465.813280820107 2020 6185.519259774044 2021 7301.908085568005 2022 7681.295257222773 2023 7845.385362265289