Year	current US$
1970	4698358172.92636
1971	5640839057.39527
1972	6967357278.4022
1973	8810374271.19736
1974	10955151467.8258
1975	13119077894.4877
1976	14057225461.8141
1977	16531699306.9889
1978	20546425612.0853
1979	24562984129.3271
1980	27454265237.2666
1981	24024677602.4837
1982	23808327025.0952
1983	22993214722.229
1984	21292473998.6577
1985	21444675428.4973
1986	30165306010.4939
1987	38496645669.4049
1988	41830056206.6367
1989	41429693320.3342
1990	51355496699.0971
1991	52993159386.0244
1992	59430787470.2747
1993	58386335069.1937
1994	61264449441.6017
1995	71976393061.8713
1996	71147712410.6862
1997	64007228368.1618
1998	66176405225.9965
1999	67734356388.6873
2000	63849335499.2851
2001	66876656805.808
2002	75205260704.7094
2003	93614834055.5851
2004	106509135890.541
2005	110215201323.246
2006	116119034773.228
2007	133247468335.072
2008	150917160190.203
2009	148586171445.817
2010	145551758547.226
2011	153144308856.141
2012	142909613558.318
2013	150299134112.094
2014	151935320697.85
2015	128417241007.437
2016	130517159834.612
2017	137202038245.66
2018	150519738021.873
2019	149144230531.632
2020	159193582646.189
2021	173266724485.384