Year	current US$
1970	316.64930716701446
1971	370.3163344913541
1972	424.6607434107511
1973	551.2042228335024
1974	614.4877200617102
1975	602.1349714512252
1976	537.5314761796187
1977	612.9611161887702
1978	668.0954369578177
1979	747.801947644213
1980	762.5423030991809
1981	711.1778950134432
1982	726.3783540720605
1983	670.0619583511777
1984	654.7642948363913
1985	573.9484436037502
1986	606.7853733945265
1987	669.8561646164422
1988	794.3533992789899
1989	731.9765180851464
1990	747.780848318875
1991	744.4959153906315
1992	779.1744436806483
1993	776.851911137018
1994	1277.2337716491866
1995	1285.6670099936161
1996	1414.2019476350017
1997	1598.9178623441392
1998	1493.9448632375745
1999	1401.7159241729978
2000	1406.7656830055685
2001	1435.3451812614028
2002	1509.8865895727995
2003	1778.842234415066
2004	2168.0281863795376
2005	2527.7628384179743
2006	2639.8056689534537
2007	3011.1008086675183
2008	3344.054558780187
2009	3250.953096782476
2010	3494.3952245519818
2011	3789.6269953762157
2012	3902.311992315659
2013	3989.8985904766214
2014	3948.7280222933628
2015	4048.46711296568
2016	4105.810905195097
2017	4261.640343222143
2018	4189.052190520511
2019	4308.3007294066
2020	4042.7227515432382
2021	3857.6897420645882
2022	3745.560367463125
2023	4139.029587230001