Year	current US$
1970	9031654.78479154
1971	34503892.3542504
1972	59690055.1368157
1973	116845575.325984
1974	787385055.442622
1975	807427352.507113
1976	912675415.180803
1977	998456600.364009
1978	875115625.472317
1979	1926994377.36667
1980	2244910879.74404
1981	1698366416.47454
1982	1094610406.58334
1983	1417960808.58817
1984	1475037336.61667
1985	1823369356.15002
1986	758938480.397794
1987	1260753402.34413
1988	991226007.380381
1989	1625497106.2476
1990	2379300881.65056
1991	1201920282.21777
1992	833634803.261968
1993	700820448.905748
1994	593446891.430892
1995	699294886.466824
1996	1089092625.13455
1997	1010189785.37188
1998	322727285.76833
1999	1212966453.40908
2000	3223352857.6247
2001	2840347049.22655
2002	3630393774.66598
2003	4044511713.10734
2004	6702579024.62643
2005	10232164892.4033
2006	12739603848.6772
2007	8131918630.42257
2008	13881106302.382
2009	8503298427.32119
2010	10354412666.0001
2011	17083493988.0279
2012	15996332555.2886
2013	15537989835.2582
2014	14170717415.3949
2015	6163450291.57704
2016	4613934092.69463
2017	8237704799.91244
2018	14198048841.9663
2019	12520622770.3244
2020	6087204247.87979
2021	15115244865.3786