Year	current US$
1960	252000000
1961	180250000
1962	250260000
1963	212260000
1964	257270000
1965	173000000
1966	179000000
1967	218000000
1968	161000000
1969	209000000
1970	256880000
1971	491968242.85866
1972	832180337.786418
1973	1045105615.69589
1974	638636661.933293
1975	426901407.132707
1976	490794239.650747
1977	442531023.810227
1978	450997133.966488
1979	450737429.373526
1980	352086600.560017
1981	673880461.921085
1982	635908375.897001
1983	777644087.350305
1984	1786675227.17011
1985	1595722319.8594
1986	3771167785.89165
1987	3259603087.00648
1988	2835949778.63304
1989	3026842536.8623
1990	4128788337.05595
1991	2949758228.55426
1992	3078999312.49742
1993	3337384444.4833
1994	3708505758.36894
1995	4409840589.36152
1996	5953469109.84827
1997	4451316559.89594
1998	4203708705.11042
1999	4455337955.03925
2000	3952081062.22381
2001	3564653927.06515
2002	4962816762.42559
2003	6085430341.53138
2004	6947354918.07845
2005	8892727557.55882
2006	14068475834.3701
2007	17247175110.1585
2008	11052155510.1672
2009	15594002509.4738
2010	16722654735.8853
2011	17011945022.1814
2012	17582960687.9069
2013	16317764962.7089
2014	15861069905.1322
2015	14699798262.9867
2016	17808384489.6379
2017	20683740690.7906
2018	17656593019.6171
2019	17813501891.014
2020	13733288688.8516
2021	16113750239.6804
2022	14399554617.1628
2023	15487380827.5418