Year	current US$
1971	299.4717214891923
1972	311.59695490471705
1973	346.7379912398349
1974	387.1369397752588
1975	426.92532368204974
1976	528.7791598975687
1977	651.9473761135401
1978	671.0515454266722
1979	732.3195247999602
1980	731.8222545102564
1981	693.6561196526401
1982	665.3410318176901
1983	683.5643373733838
1984	703.5179201615275
1985	721.9756126357537
1986	703.7918463894096
1987	725.2276986414312
1988	753.3569052816974
1989	771.8829899662348
1990	823.9814446229109
1991	882.1888989512312
1992	971.9082125746901
1993	1110.355402758598
1994	1267.377361286271
1995	1459.9485798674646
1996	1551.9277932949435
1997	1632.3140542840408
1998	1733.9140802466168
1999	1750.8274477705384
2000	1820.3283575137596
2001	1875.471585826327
2002	1915.498057456413
2003	1978.7797760533406
2004	2032.6897682929523
2005	2178.991861114472
2006	2369.936843425815
2007	2504.0997441192953
2008	2625.7044863013275
2009	2522.438389306667
2010	2646.677822743233
2011	2931.9546736824154
2012	3010.034174793326
2013	3028.666304843782
2014	3088.36693698482
2015	3181.578241876847
2016	3240.604495089841
2017	3301.2944874266072
2018	3395.908896201625
2019	3535.0636037592017
2020	3178.73711096268
2021	3676.349572267221