Year	current US$
1960	239.033005807284
1961	209.91717764236665
1962	169.9270133210551
1963	225.82339136841176
1964	238.87780494167902
1965	253.30905902072348
1966	241.00257174750112
1967	261.36623394432195
1968	292.0289839661601
1969	315.56209436623186
1970	352.53384038493095
1971	359.821798878964
1972	468.6192554668465
1973	588.9072578534341
1974	871.7314619919703
1975	989.3931629333667
1976	1074.405244800577
1977	1223.9919854379953
1978	1495.2091029704923
1979	1829.8971557057062
1980	2259.724366476104
1981	2291.7561006666747
1982	2260.347523849369
1983	2359.5932639742396
1984	2510.0368332423154
1985	2617.725448611184
1986	2783.4310226390976
1987	2829.879274047583
1988	2437.3779230141326
1989	2235.2681221341295
1990	2431.551359688655
1991	1749.286087489665
1992	1794.6235074051515
1993	1825.8750965670101
1994	1522.8252028482846
1995	1466.5446803774191
1996	1619.5324124278452
1997	1634.4674098812914
1998	1610.3029776132537
1999	1602.8649145582024
2000	1780.3760628060447
2001	1904.2155535678232
2002	1945.1919286803193
2003	2292.3175814849506
2004	2827.227164592993
2005	3248.0998143231923
2006	3681.2909881779774
2007	4192.663169155412
2008	5217.991821573554
2009	4270.858451460292
2010	4958.259379136102
2011	5974.570086826111
2012	6096.090015492628
2013	6044.674903307029
2014	6164.644698975247
2015	4741.499770335584
2016	4481.081961530665
2017	4615.868743648854
2018	4640.314145379558
2019	4530.101744836313
2020	3794.4095244863906
2021	4216.251285130302
2022	5023.252931649279
2023	5260.206249807974