Year	current US$
1970	158569999.95559454
1971	185939999.78713694
1972	197950000.07003543
1973	207089999.42056835
1974	205760000.7168949
1975	302860000.55260956
1976	267780001.0759383
1977	252219998.81416562
1978	330750000.36507845
1979	399859999.5076656
1980	505889998.09324735
1981	616050003.9458277
1982	551580000.7879733
1983	471740002.26706266
1984	453829998.87689954
1985	494460001.30474555
1986	584710001.1110306
1987	611549998.998642
1988	710379999.9356271
1989	746069999.4266033
1990	672549999.5127323
1991	705420002.3673477
1992	616210003.6032499
1993	537400002.1722167
1994	428789997.2554296
1995	396440001.93476677
1996	457059998.2514976
1997	567800000.1218166
1998	502660000.16033643
1999	404490002.5110692
2000	323929997.6583571
2001	276810001.77934766
2002	271490000.1492353
2003	295259999.96252364
2004	367050000.38072467
2005	382310002.0810963
2006	425210000.8688867
2007	426359998.73280513
2008	490040000.4088877
2009	522469998.81044054
2010	500410001.59084797
2011	405029999.3474036
2012	396493944.45973843
2013	379613067.68655777
2014	389292059.2147855
2015	347488127.99861485
2016	309849900.6517232
2017	281117227.404935
2018	245765216.2332088
2019	315412959.31115746
2020	356871509.3657375
2021	357470465.9893177
2022	389217550.6167113