Year current US$ 1960 1397.5948032844049 1961 1472.3857140786822 1962 1525.775852710321 1963 1613.4568837339225 1964 1748.288117614103 1965 1873.567774354205 1966 1986.747158696848 1967 2058.7818819805584 1968 1951.7585958753211 1969 2100.6678685867173 1970 2347.544317737474 1971 2649.8015138722335 1972 3030.4325141197723 1973 3426.276220503779 1974 3665.862797641903 1975 4299.745617992836 1976 4138.167787615347 1977 4681.43993173038 1978 5976.938168999906 1979 7804.762080511547 1980 10032.062080014974 1981 9599.306222219648 1982 9146.077357018517 1983 8691.51881306514 1984 8179.194440649911 1985 8652.21654247593 1986 10611.112210095978 1987 13118.586534629034 1988 15987.168077568824 1989 16239.282196094424 1990 19095.46699846078 1991 19900.726650506862 1992 20487.170785287846 1993 18389.019567509866 1994 19709.238098365302 1995 23168.95295801709 1996 24406.400298359004 1997 26766.00562496839 1998 28274.504511969917 1999 28762.09135702561 2000 28280.926786099004 2001 27906.569502964052 2002 30077.741432187977 2003 34442.68754023079 2004 40366.888665096805 2005 42104.78843750239 2006 44512.459029686455 2007 50397.6854954706 2008 47396.120207848355 2009 38744.13169304295 2010 39598.95711954499 2011 42109.64187957491 2012 42497.34049743217 2013 43426.29814051428 2014 47439.616589512465 2015 44964.391143729204 2016 40985.23513824167 2017 40572.121482378294 2018 43203.8141057739 2019 42662.535374031075 2020 40217.00901169857 2021 46869.75905841103 2022 45564.15694480128 2023 48866.60396002978