Year current US$ 1960 150.62112889004905 1961 151.55773581709218 1962 153.01553997667332 1963 166.7182979535843 1964 187.03967831908574 1965 203.40684773764545 1966 221.88195557440613 1967 235.41721045784007 1968 253.78333739520548 1969 285.2606153079693 1970 320.24380841768874 1971 346.6660228208623 1972 420.995123726761 1973 542.7239142937303 1974 612.4295563323564 1975 658.0467858488848 1976 711.766961468489 1977 835.1529993644729 1978 1039.0671489128174 1979 1110.5709543013054 1980 1182.269641518227 1981 1283.67116742775 1982 1237.2197678295931 1983 1296.5297109194673 1984 1366.6819532495495 1985 1420.4028317356156 1986 1829.3061629433485 1987 2113.3011906037314 1988 2500.1288895322855 1989 2562.9954633747548 1990 2634.9272504504165 1991 2934.4117227049323 1992 3165.2227780439844 1993 3495.702821995464 1994 3861.371536186771 1995 4331.821742001939 1996 4124.910503097365 1997 3897.691659444777 1998 3450.8843168849817 1999 3816.377124310365 2000 4090.212513036937 2001 3769.3685121200715 2002 3796.964235344433 2003 4142.707404766701 2004 4610.31976489878 2005 4882.173071108127 2006 5136.2782639795905 2007 5697.90478357677 2008 6523.261014440261 2009 6664.924825909795 2010 7726.915302804018 2011 8893.532540630165 2012 9436.8474533018 2013 9468.679745521624 2014 9695.983116063984 2015 9586.05662481986 2016 9856.665623565274 2017 10454.535803524874 2018 11312.9085413924 2019 11484.341011840694 2020 11487.83281321823 2021 13141.528661215729 2022 12909.918739596245 2023 12927.683808296166