Year	current US$
1970	156.04720578354377
1971	164.67500460094982
1972	180.14501025195753
1973	222.25409614951155
1974	266.4010544088138
1975	287.0814745274239
1976	299.2387686881103
1977	326.91916726512056
1978	345.9927393483275
1979	388.3923245816697
1980	443.3068877572888
1981	505.7962305660163
1982	488.50665917748466
1983	460.8842056173399
1984	458.8068627073752
1985	465.7924239079661
1986	478.42164911698006
1987	472.9357516227117
1988	504.8954513969012
1989	529.0550444754138
1990	600.9392277226092
1991	616.8586267425245
1992	659.1264617078376
1993	713.4336265849822
1994	797.4795907031183
1995	895.1343707820406
1996	976.0163684596862
1997	1019.1140420188043
1998	992.2585249909889
1999	960.5739268484228
2000	1012.4681871600563
2001	999.0796378497586
2002	1006.4635158110955
2003	1107.7278472668993
2004	1269.961134511991
2005	1465.350795660064
2006	1708.7267095712255
2007	2077.6901476479
2008	2389.241201368781
2009	2414.4580312676594
2010	2854.5480704459346
2011	3255.3501058780776
2012	3451.8596625221926
2013	3609.5531396914425
2014	3755.3650962302722
2015	3627.2889446694257
2016	3635.962665066984
2017	3926.2395686181053
2018	4060.883473279948
2019	4110.571348712538
2020	3909.6815827940422
2021	4483.688576856512