Year	current US$
1968	28178688940.956097
1969	31103070447.729523
1970	35147390094.11454
1971	39256498011.480705
1972	45598349839.81745
1973	53492971531.45596
1974	69402496339.74286
1975	95019882814.89188
1976	115693962305.49382
1977	146208975615.2073
1978	176510905531.9149
1979	215828303070.4398
1980	258270358538.45847
1981	295426156340.2691
1982	331881700959.30554
1983	343531318016.34863
1984	354138388171.1598
1985	355317928304.6734
1986	363406949107.80145
1987	376147492341.98486
1988	376576523482.4264
1989	417721252278.7097
1990	497399568314.43567
1991	401534641115.5886
1992	381703164571.9863
1993	396614700410.4582
1994	402790796926.7661
1995	414462706172.2917
1996	435146613163.842
1997	465918822408.0605
1998	475474527272.842
1999	483696156285.1072
2000	501315958442.88965
2001	507564984379.82764
2002	513543128855.2163
2003	545471613137.7828
2004	620556900407.5094
2005	698675712783.3258
2006	809415576659.3145
2007	964630114443.9196
2008	1157919792766.2158
2009	1193319468628.9336
2010	1272905535568.25
2011	1432213807515.067
2012	1567960303670.7078
2013	1672575293807.1833
2014	1826251416422.868
2015	1806806616109.1792
2016	1788017384194.9092
2017	1772435522600.179
2018	1863942748016.4587
2019	1958371476028.1362
2020	1932247277415.9277
2021	2029524717921.4756
2022	2197232744457.3804
2023	2265379157038.3574