Year	current US$
1974	44764400.753
1975	83984680.4146
1976	83101375.4924
1977	241976307.60329998
1978	856137444.2439
1979	1260299390.6525
1980	1393907258.6463997
1981	1124697891.3621
1982	807957077.0403
1983	935808987.5575998
1984	820149895.1791
1985	890252652.1535001
1986	808543693.0981
1987	846580235.5053
1988	967235179.8967
1989	1207579986.101
1990	2319680530.9323
1991	1725046307.4220998
1992	2063513499.291
1993	1833720635.4017
1994	2015155919.5553
1995	2121435531.529176
1996	2013948805.7160218
1997	2122344307.7780285
1998	2419608649.255354
1999	2643743562.914913
2000	2663136834.284768
2001	2877207153.798495
2002	3329541990.5029497
2003	4321853669.763847
2004	4692348755.998085
2005	4103171261.252986
2006	4493785815.880446
2007	5540698054.1591835
2008	7150652724.498764
2009	6726490239.030443
2010	8504315340.16739
2011	7741092932.72027
2012	9618793644.353073
2013	10250007038.179798
2014	11100417893.135096
2015	11545255197.662754
2016	11390518746.363976
2017	11706422016.359882
2018	15777596239.162382
2019	15842570192.063334
2020	14787667002.00039
2021	16096074479.302319
2022	16801075979.939375