Year	current US$
1970	2620130737.72326
1971	2514877024.46592
1972	2875533012.74498
1973	3386424850.16492
1974	5585216604.53961
1975	6837512178.68266
1976	7926590692.28382
1977	9733260726.29875
1978	10378362986.3286
1979	11379977519.224
1980	14346918185.0517
1981	18065967911.6061
1982	16493468067.636
1983	13458505146.7997
1984	13066302973.1128
1985	13351827268.7834
1986	12380812903.7301
1987	11114226283.9392
1988	9811111542.77324
1989	10090039839.911
1990	10992861679.7499
1991	13387341540.7446
1992	14573813841.419
1993	15220616568.2701
1994	18271328794.0204
1995	19394990607.0183
1996	19625378863.0785
1997	22617876602.1475
1998	22982761044.3257
1999	14812003972.8423
2000	12755533688.0781
2001	18910208393.8856
2002	22566242232.0959
2003	25240182232.306
2004	27174863840.2202
2005	29467296538.7337
2006	32563577758.4785
2007	35933461478.7072
2008	43760426672.1015
2009	48984102423.5926
2010	52529830350.4796
2011	57804657801.3424
2012	65344061677.9224
2013	72200234598.4456
2014	77116284795.0015
2015	78963239412.9177
2016	78974082894.3743
2017	80819082075.4766
2018	79599885020.6545
2019	80158709240.9735
2020	75753567512.4778
2021	78171039766.9199