Year	current US$
1970	1982114487.12486
1971	2345896626.56641
1972	3157787419.66493
1973	3824585782.75264
1974	5194047091.56488
1975	5940439752.52702
1976	6514831655.27586
1977	7474370314.26777
1978	9259068242.00448
1979	10695851719.2134
1980	11181154883.6178
1981	9330859335.86508
1982	8853055550.87896
1983	8314378028.72364
1984	7254736619.50551
1985	7157369540.20699
1986	10398095980.3921
1987	13318056853.7859
1988	13664293595.7186
1989	12997564536.0075
1990	15785758798.2573
1991	16309825367.7511
1992	18974011623.2521
1993	16971146279.0698
1994	17947520000
1995	21133937688.7181
1996	20719422222.2222
1997	20237120823.49
1998	18577148826.4027
1999	17837847067.7738
2000	16930940877.0617
2001	17752374272.0786
2002	19756886934.5896
2003	25486030349.0631
2004	29109991593.0153
2005	30570259533.5967
2006	31974339661.4787
2007	35946487917.1947
2008	41373615221.5797
2009	41587570012.2907
2010	40987317417.932
2011	43614036401.3177
2012	45212268391.9875
2013	42575173132.3211
2014	42832852657.8448
2015	36281583565.2737
2016	38314617495.9422
2017	38441655086.3893
2018	43771287086.8955
2019	41907634492.4732
2020	41361371896.197
2021	46535054512.5115