Year current US$ 1960 0.14830633826426085 1961 0.2882218090669568 1962 0.9805569605259035 1963 0.6808186264492327 1964 0.7942391011714431 1965 6.436166104574827 1966 7.644685243315474 1967 16.15172899910786 1968 18.93803239740309 1969 6.9414211533813654 1970 15.609824058113176 1971 8.076992839260193 1972 13.105572188010752 1973 14.788491831881338 1974 32.606214744530305 1975 34.66093273785787 1976 43.40451412816005 1977 67.6077500503249 1978 90.30728984986855 1979 235.0112977967774 1980 155.82991784365512 1981 178.2210956454763 1982 177.44581984029358 1983 176.94187363929117 1984 150.5843999987343 1985 131.1627380581763 1986 144.21393106574095 1987 211.10562947616233 1988 176.23214683508917 1989 231.85841964181787 1990 275.00075580672257 1991 172.50782672160489 1992 222.24460473445902 1993 285.6511083935784 1994 294.09110430764855 1995 320.4737181104384 1996 292.62936967737113 1997 255.0219562905472 1998 198.2376696228442 1999 189.4451932186484 2000 160.0343077326579 2001 199.98061611906212 2002 173.5000600061828 2003 213.19797173529162 2004 193.36227070663773 2005 311.3610272324785 2006 212.44937815182598 2007 259.4759848861935 2008 234.35453807973667 2009 328.3431671878575 2010 617.6024109479546 2011 822.9641724228361 2012 727.2422867032781 2013 757.2205953729197 2014 753.3809936699745 2015 644.5412028220247 2016 781.4998118417097 2017 827.4913755815927 2018 926.7712501021607 2019 1028.5752107959145 2020 1548.4446740982671 2021 1066.52706353532 2022 2761.1408391788073