Year	current US$
1970	270399512.140513
1971	406626154.368203
1972	408895907.402525
1973	778804963.902828
1974	3977315462.20303
1975	4616362257.97022
1976	5595594617.04231
1977	5681993616.00002
1978	6529322567.8674
1980	16422280705.5582
1981	3114528872.6054
1982	2627386669.24413
1983	1925103553.00111
1984	2588271403.5251
1985	3371531820.60964
1986	2286207128.21448
1987	4329714446.60364
1988	3090384314.13724
1989	4972633056.90755
1990	3282159083.95893
1994	143577786.055499
1995	162175340.734889
1996	213270793.778689
1997	655607937.362499
1998	1375879584.89432
1999	2861001639.25807
2000	5093791305.36932
2001	3597150752.82698
2002	2643303645.21753
2003	1295239595.5687
2004	3962375138.81965
2005	5077256523.31609
2006	6865987576.15748
2007	8132795263.11307
2008	14343480102.047
2009	8634479707.46036
2010	12046116746.0126
2011	20684868555.825
2012	21659198789.838
2013	21971607858.301
2014	24358707399.2063
2015	16422126351.5137
2016	15962046420.4334
2017	21277739425.1615
2018	30176622632.1813
2019	28047051859.7878
2020	13331730777.3794
2021	23752299145.6816