Year	current US$
1975	298469382.70382655
1976	322436869.9471005
1977	347468606.73709387
1978	388898225.0285885
1979	479938348.3319247
1980	537562770.3475364
1981	614179883.6573361
1982	627952070.7999802
1983	656838860.4385223
1984	711977328.0962563
1985	694575647.5911102
1986	869189081.6884602
1987	968229503.3063194
1988	951325013.672749
1989	1043156167.6527619
1990	1401034157.0128772
1991	1454233580.2714663
1992	1432900000
1993	1490627952.0708
1994	1514890866.6036892
1995	1680157112.315418
1996	1745637150.1019242
1997	1888629244.7670662
1998	2048128076.3685179
1999	2192711181.822702
2000	2276950000
2001	2328650000
2002	2299650000
2003	2147500000
2004	2470650000
2005	2808500000
2006	2986501900
2007	3239533000
2008	3438531050
2009	3195647800
2010	3392352600
2011	3490589300
2012	3539179250
2013	3581980550
2014	3654401850
2015	3659472900
2016	3807462750
2017	3865270950
2018	3878427700
2019	3966077000
2020	3922290050
2021	3935869600
2022	4413012200