Year current US$ 1961 184.77459313590674 1962 185.42105380070151 1963 184.55847996149055 1964 239.3778656942276 1965 264.43136076999457 1966 267.9545682409573 1967 275.7244058649078 1968 294.77281394512784 1969 270.9897472649115 1970 275.7136584263091 1971 290.19389886724053 1972 328.7538520594163 1973 401.86960633773 1974 484.8416837073197 1975 540.0479082674491 1976 577.7006604407873 1977 578.4501861216327 1978 565.9289631220455 1979 650.4214822741101 1980 695.5128948469464 1981 712.4469571977758 1982 693.7085992045999 1983 707.7329957259299 1984 633.5961963727574 1985 578.2188421087902 1986 659.9682084540655 1987 726.4170147474217 1988 742.426485476969 1989 742.0037539799622 1990 751.1934823511681 1991 1032.6141564730478 1992 1007.8096459248794 1993 825.7936345797432 1994 840.0502399184693 1995 878.7506081818282 1996 877.829777673328 1997 834.043760019192 1998 796.842528173849 1999 757.809066486217 2000 660.3038610606924 2001 632.2141417511384 2002 629.7819016602494 2003 711.3824821532057 2004 801.7786831295628 2005 974.6575859467029 2006 1272.0824339661315 2007 1378.2151036337143 2008 1610.2369793316047 2009 1418.9408429234725 2010 1646.1304275681384 2011 1919.4522707967851 2012 1850.3849677447945 2013 1929.7756392353 2014 1715.3888379280197 2015 1562.7268364882764 2016 1579.2007167351153 2017 1634.6421583307445 2018 1749.9542364537306 2019 1800.875186582183 2020 1836.2924109859177 2021 1998.3940026558594 2022 2057.380392458174 2023 2149.4140872533458