Year current US$ 1960 74.08156289966276 1961 75.4368562560782 1962 76.47270367797785 1963 77.83105729104803 1964 82.41896821599525 1965 87.35206013866971 1966 91.59504028504601 1967 94.49563100693531 1968 97.8372162656973 1969 100.57930792285775 1970 107.57835207347922 1971 110.8015745811006 1972 117.76836874968059 1973 132.6164280674302 1974 145.36079967487618 1975 141.91171826279603 1976 149.53039123160897 1977 167.73520004200722 1978 175.5728428316012 1979 189.478464162268 1980 200.67223748297752 1981 209.6009454249755 1982 212.28886171914758 1983 229.67494383825667 1984 211.67596522881433 1985 241.210374052919 1986 243.49906299959784 1987 251.7971713139531 1988 251.1959925725717 1989 254.63121742733156 1990 260.6400615774897 1991 276.3418006027042 1992 206.7771141115008 1993 168.26106223509777 1994 127.66594420020121 1995 136.6680345338496 1996 147.62531787040365 1997 143.77004194980398 1998 126.91984858419593 1999 121.28560485940095 2000 122.96165968141396 2001 119.26185726077216 2002 110.46087472148301 2003 117.86016473352753 2004 134.54248633268392 2005 160.07679177205804 2006 191.75129245508 2007 240.34797195503225 2008 320.86108971168284 2009 373.8939587121452 2010 335.43849527093056 2011 348.0013482914652 2012 458.5509207930573 2013 490.7924784203907 2014 557.5341483604377 2015 630.3126193830542 2016 705.6175085435892 2017 755.7526443486662 2018 758.2976944945804 2019 840.4496012551706 2020 918.6525940774183 2021 925.0006975915795 2022 1027.4986313632471 2023 1293.778007597603