Year	current US$
1970	3914228.45555542
1971	4376328.65871496
1972	5662228.74725935
1973	6959368.19653459
1974	9351736.68691416
1975	10452565.9862567
1976	8477929.39716278
1977	11430285.5282919
1978	11796628.2515948
1979	13162761.5418684
1980	11014494.5835749
1981	12041805.3733196
1982	13204767.567642
1983	14166450.9021355
1984	15499423.8467099
1985	15552082.9866344
1986	15449330.724581
1987	18650750.135725
1988	21496465.8612696
1989	23197079.9601403
1990	34478431.372549
1991	39006630.3575657
1992	42225490.1960784
1993	45302367.6670185
1994	37579628.7913083
1995	41930709.1043924
1996	39502974.2981748
1997	39870796.2595662
1998	39538813.1743219
1999	54099532.5427719
2000	162373219.04228
2001	170476607.700414
2002	181074445.539495
2003	190425443.6881
2004	204085398.545749
2005	217675958.714195
2006	234260838.380989
2007	256260908.627359
2008	274912032.154265
2009	266560670.655783
2010	278752889.960453
2011	299436337.368378
2012	307033284.661471
2013	323640308.124089
2014	333695944.325488
2015	330943928.831684
2016	344161383.421447
2017	358239904.034261
2018	363510827.477743
2019	379065128.571406
2020	361106817.898913
2021	474263851.392818