Year current US$ 1962 248.8593729557736 1963 271.36492954141045 1964 302.17082212839927 1965 336.52269938318665 1966 361.49124510807195 1967 357.279843524623 1968 368.3831899542727 1969 404.06410509242795 1970 443.0324482201623 1971 461.6525184580702 1972 506.09726368483723 1973 611.7867530415726 1974 758.5466656174513 1975 920.3718876096335 1976 983.674290380408 1977 1025.7065140189052 1978 1103.9827617967442 1979 1275.125040943159 1980 1468.779822281639 1981 1615.7997165946094 1982 1597.0196890032298 1983 1471.9576957621446 1984 1316.1999540937868 1985 1302.1848474973888 1986 1345.3581717592265 1987 1407.3103110103655 1988 1454.206104453895 1989 1430.9641250059456 1990 1132.0185914428569 1991 1028.1062121555633 1992 1131.7848430301578 1993 1216.00347751751 1994 1322.728482118066 1995 1450.55138550192 1996 1626.4048371412616 1997 1758.5998999496555 1998 1722.7804990511208 1999 1697.566973591131 2000 1772.0895253390836 2001 1782.7968654545032 2002 1802.514472840403 2003 1950.43001872134 2004 2255.17688761796 2005 2621.5182497129226 2006 3042.872709842027 2007 3600.75723469301 2008 4251.686445515286 2009 4626.898624656352 2010 5256.75426844834 2011 5933.822985383116 2012 6772.837759883995 2013 7373.140654528892 2014 7661.31632440862 2015 7553.680896052184 2016 7463.699056091412 2017 7660.099416967437 2018 8218.70269744994 2019 8651.441153121421 2020 8419.674278854483 2021 9341.116709538985 2022 10069.277320188783 2023 10587.606291563528