Year current US$ 1962 385.6848992691217 1963 376.3271575935098 1964 409.43958954047775 1965 472.377165598319 1966 509.65037700419214 1967 556.569512367547 1968 585.5806965244526 1969 632.8507017811388 1970 672.1298870118917 1971 721.8919790098629 1972 771.5071266094761 1973 891.9286709781791 1974 1029.6269354245526 1975 1261.4303224645741 1976 1164.3980413014522 1977 1252.3989129224647 1978 1398.6038981602785 1979 1715.835471663591 1980 1937.0033894850246 1981 2063.7606962110726 1982 2085.851481955594 1983 2070.526586952524 1984 2263.329160508014 1985 2464.9204271878666 1986 2741.227282499438 1987 3087.0718159055036 1988 3491.0080251251725 1989 3537.45277605824 1990 3426.516029605553 1991 3392.3631663628767 1992 3550.5330398795236 1993 3620.9732675856485 1994 3784.079310928019 1995 4234.38590070721 1996 4617.30490840299 1997 4584.724692940256 1998 5022.417413913302 1999 5856.5131364489325 2000 6289.9350356986715 2001 6293.690954487895 2002 6462.642696311688 2003 6807.398668072772 2004 7388.013343874617 2005 7921.166767162951 2006 8458.924183085617 2007 9193.653326298843 2008 10066.79417966537 2009 9968.290708413244 2010 10051.762645826318 2011 10182.260164225045 2012 10627.97950453778 2013 10712.95889986447 2014 10848.669027087099 2015 10810.52277172261 2016 10607.637651816263 2017 10769.692341642369 2018 11183.84502342808 2019 11523.035188243273 2020 10187.441898784247 2021 11355.215585114576 2022 13923.364919134487 2023 15829.80986864681