Year	current US$
1981	574600000
1982	577200000
1983	583600000
1984	468750000
1985	507625000
1986	757500000
1987	794566666.6666666
1988	824866633.3333334
1989	830500000
1990	623640000
1991	500357894.7368421
1992	208823943.66197184
1993	149011137.36078298
1994	233003004.45822832
1995	161232919.46233922
1996	169515119.35565633
1997	144249927.21426854
1998	175413927.20884916
1999	154741806.1824032
2000	174027310.50114608
2001	212913413.6681554
2002	225161573.14969936
2003	227210700.89137754
2004	288206665.4292657
2005	306321640.630598
2006	398873966.73901355
2007	553563955.0420587
2008	823363359.619901
2009	646967089.3973062
2010	912210513.0346427
2011	1275745397.9637408
2012	1662819944.312674
2013	1693192031.773165
2014	1591526648.9831517
2015	1728084159.4439986
2016	1784017519.6393306
2017	1599151937.2346165
2018	1672693561.6944857
2019	1862164548.4558
2020	2104814769.431675
2021	2279626780.104198
2022	2386565680.0352087
2023	2637218639.893751