Year current US$ 1962 245.81217651328225 1963 265.30529719767657 1964 291.47694612749797 1965 315.25380409319195 1966 327.05217311204115 1967 325.72267832966384 1968 332.13946083373395 1969 361.52951835366076 1970 392.4213552196176 1971 410.69379092546313 1972 445.54361028826344 1973 534.1686301200933 1974 654.9519974876034 1975 776.9033418365512 1976 817.6896009985908 1977 852.6787972892894 1978 926.4665523372826 1979 1065.0669566700649 1980 1242.764877365687 1981 1368.5782743899022 1982 1345.1462057737212 1983 1248.2115862426576 1984 1137.3504759142038 1985 1129.954940628356 1986 1175.4813107937896 1987 1247.2500613522736 1988 1308.321544982119 1989 1280.7581370925154 1990 1053.8230849975082 1991 966.9318576612363 1992 1019.0460536147285 1993 1061.082006619285 1994 1123.0360543600284 1995 1221.33033870835 1996 1350.9947742926176 1997 1445.0762031256777 1998 1403.6351358339111 1999 1379.1412952769886 2000 1427.1647885708514 2001 1438.3745757049742 2002 1455.9969835701995 2003 1580.5717870149977 2004 1838.8837452685943 2005 2147.4458587581903 2006 2496.9143558460114 2007 2966.9312120862533 2008 3501.86929293257 2009 3764.86732779543 2010 4206.329546613259 2011 4689.836504294782 2012 5320.742392470093 2013 5745.640519053345 2014 5926.104505997952 2015 5743.353358901635 2016 5629.84123560706 2017 5753.434800111478 2018 6189.85783080472 2019 6520.32699669907 2020 6289.270412578966 2021 6973.930795021677 2022 7538.964625674121 2023 7931.077732734498