Year current US$ 1965 160.57473654550003 1966 166.95611215979883 1967 172.96385744093342 1968 178.65710803918952 1969 191.91857401303002 1970 231.2174023687923 1971 242.13327855261608 1972 255.97141397734322 1973 272.04535307777866 1974 243.31326721429224 1975 299.98719990696054 1976 335.84633385708077 1977 354.8976152114659 1978 356.2506611421984 1979 422.6960460166625 1980 495.32853556101117 1981 493.0131758954831 1982 600.043052116351 1983 653.9354411899672 1984 697.8979337420917 1985 780.5105282441866 1986 802.2179693748443 1987 765.6057308784104 1988 644.2196325290342 1989 712.9148760466035 1990 751.1874901812768 1991 637.8975973418865 1992 697.7260404795164 1993 758.8296192150335 1994 826.7189671315039 1995 937.5431501305025 1996 1031.4880781050385 1997 1170.804797892296 1998 1239.3535622708573 1999 1297.5746900609604 2000 1398.8598307867214 2001 1327.096518329908 2002 1144.5323984197428 2003 1056.937208965947 2004 1016.2538839562844 2005 1133.1054605717552 2006 1332.3394100028158 2007 1586.47292057972 2008 1941.8999726933735 2009 2212.218147889319 2010 2509.772034175215 2011 2645.6225349104025 2012 3059.1354277920414 2013 3088.8908340842972 2014 3196.8613807868655 2015 3370.382447160154 2016 3331.612461346881 2017 2439.9672843996764 2018 2531.200078645366 2019 3017.2583357894123 2020 3571.556906513504 2021 3886.722498390104 2022 4295.407495610141 2023 3512.580065297977