Year	current US$
1970	204874807.063944
1971	231665974.53426
1972	197196902.47564
1973	249189562.194814
1974	343041118.005719
1975	369431738.550652
1976	344297649.64316
1977	398559322.491489
1978	563773725.669988
1979	619910132.1857
1980	618957097.684852
1981	719507554.716694
1982	699754191.677987
1983	627304021.519522
1984	445317626.188865
1985	437379311.664239
1986	555325063.038798
1987	694838441.719298
1988	838801584.985802
1989	1058500838.30847
1990	1120118945.91433
1991	1160902536.7368
1992	1373204913.69407
1993	1417148641.63418
1994	1688344801.69912
1995	2174355369.53859
1996	2742040896.8382
1997	2864828128.6566
1998	2574006284.5607
1999	2719719212.26453
2000	2353039667.54389
2001	2049540003.95704
2002	2262448406.79139
2003	2228392919.40712
2004	2035729412.30874
2005	2122270151.3284
2006	2620608689.25582
2007	3195797736.31415
2008	3734410209.44469
2009	3611869158.6046
2010	4264149608.66864
2011	4774718344.17209
2012	5351156177.96764
2013	5838097376.2212
2014	6104494449.94233
2015	6282995118.37866
2016	6513828318.88488
2017	6710826697.02898
2018	7062235718.34551
2019	7627759596.1746
2020	7160649954.04333
2021	7510397902.03533