Year current US$ 1960 155.29449376738648 1961 163.4249877441167 1962 166.6031644654437 1963 154.65487784681147 1964 163.88456173133864 1965 165.12700762439945 1966 173.19792753747026 1967 167.77675862747242 1968 160.29992272186135 1969 171.42680641640754 1970 187.38764358768626 1971 201.12460833252607 1972 273.5520052487847 1973 295.9566057639189 1974 319.7997370417634 1975 319.960973710425 1976 313.1807646233353 1977 467.80691619685354 1978 572.732138648683 1979 665.1855282426379 1980 766.0991777970751 1981 943.5770004830277 1982 1043.91142229645 1983 1114.6142521209076 1984 1223.839496213849 1985 1313.1995129676047 1986 1444.021408649645 1987 1570.910328419141 1988 1790.9874780737407 1989 1911.903509813232 1990 2136.839516270028 1991 2259.528547877546 1992 2454.960657430142 1993 2519.8458683465856 1994 2540.1691799220407 1995 2767.7703102931264 1996 2900.4190120648254 1997 3043.2494169411802 1998 3272.6187405817764 1999 3427.5057548008117 2000 3760.080456863777 2001 4066.070637651317 2002 4299.372867799487 2003 4500.927333954175 2004 4883.313664972162 2005 5176.128146568066 2006 5775.091747495204 2007 6439.008397699656 2008 6641.495877835121 2009 6503.09777184322 2010 6590.989578886164 2011 6566.482713175996 2012 6754.370183956706 2013 7117.554762766489 2014 7210.603112840466 2015 7386.746638451151 2016 7684.792839988521 2017 7996.672074020034 2018 8399.707731021073 2019 8680.251102385218 2020 8306.360493072014 2021 8360.099738583807 2022 9297.846929162586 2023 10279.493943595467