Year current US$ 1960 1290.2860721619215 1961 1367.7888522813848 1962 1457.2651699837763 1963 1555.0229318257839 1964 1724.0189417905553 1965 1859.5099867163906 1966 1983.131198217775 1967 2113.8219413288766 1968 2251.3157590678175 1969 2490.1071730837994 1970 2765.890996647944 1971 3082.927988791257 1972 3831.631899994329 1973 4900.962200758661 1974 5733.79813933878 1975 6701.377360524328 1976 7243.047341195831 1977 8426.94695947372 1978 10289.76841732961 1979 11810.61587547254 1980 12864.002566139616 1981 10622.802483078915 1982 9343.861099596179 1983 8846.234298469735 1984 8457.268803163739 1985 8750.818512505355 1986 12170.040696270156 1987 15135.852311696835 1988 16391.09382779102 1989 16525.061743284838 1990 20600.375278982698 1991 21041.660651964783 1992 23372.61917101503 1993 22283.936021355126 1994 24208.554793144656 1995 28413.826438736807 1996 27489.555177048835 1997 24820.93805038961 1998 25338.44329349042 1999 25252.80190665645 2000 23098.88650774014 2001 23015.071263246195 2002 25006.191397109003 2003 30655.209267902366 2004 35429.40779333441 2005 36809.70134036188 2006 38705.10679591471 2007 44319.16544881302 2008 48303.397956285975 2009 44760.29124437094 2010 44184.94635396398 2011 47410.56692774637 2012 44670.56068451006 2013 46757.951855959756 2014 47764.07151208328 2015 41008.29671947198 2016 42012.622719101564 2017 44198.4823908691 2018 47544.981147275714 2019 46641.72140170868 2020 45587.96830831899 2021 51863.83115650539 2022 49942.090642488656 2023 53475.293495293525