Year current US$ 1960 1314.0469561377083 1961 1382.2871335408777 1962 1474.1221980528444 1963 1565.234670589117 1964 1689.8137045488108 1965 1812.1119647174355 1966 1959.4784116719652 1967 2069.3754022772378 1968 2218.676514714393 1969 2417.1551300484416 1970 2618.626686026034 1971 2863.540020606126 1972 3288.0692672349874 1973 3936.1570768760594 1974 4367.914799224537 1975 4844.883961850991 1976 5199.347921589056 1977 5806.769578007152 1978 6922.513229603736 1979 7914.426327461778 1980 8708.30312963501 1981 8788.224713362879 1982 8579.696417925079 1983 8796.464488054211 1984 9122.147572766658 1985 9529.250777208134 1986 11458.433365102843 1987 13167.655173287529 1988 14728.802553979453 1989 15281.846603732978 1990 17059.30189103416 1991 17883.616419468653 1992 19055.76617979985 1993 19176.236623002897 1994 20325.719572432234 1995 22224.27247722018 1996 22236.64785102279 1997 21729.684990359314 1998 21793.478179750415 1999 22719.730402678237 2000 23054.565001740124 2001 22671.476416456153 2002 23474.89595353219 2003 26058.925451363422 2004 28798.21227221641 2005 30228.65608012544 2006 31656.867391006926 2007 34404.4781607278 2008 36254.15780655505 2009 33671.83252097765 2010 35088.307757667695 2011 37547.362061581 2012 37285.60903187094 2013 37575.07758183229 2014 38112.070904583925 2015 35733.344031365916 2016 36197.21814489717 2017 37576.61750609667 2018 39507.117631212466 2019 39685.56085696488 2020 38592.77788903112 2021 42930.775133756346 2022 43681.73146390815 2023 46280.58061312694