Year	current US$
1981	78163697469.89374
1982	72377643788.31418
1983	48454295792.04893
1984	37002590670.35888
1985	34895418797.80133
1986	26395895081.604424
1987	24005805864.370293
1988	21362250383.82885
1989	18633555492.15104
1990	22720651920.471924
1991	24503936564.943253
1992	21336359487.931824
1993	24021423994.865227
1994	34184091495.454544
1995	52111320795.454544
1996	65670918586.36364
1997	72976840227.27272
1998	92566712818.18182
1999	25780442451.02288
2000	30296027060.37902
2001	34000257703.205444
2002	37042502723.058685
2003	41000599075.22362
2004	58860824181.92881
2005	78496998902.3381
2006	115623963596.28874
2007	139025716757.36224
2008	166259727491.3974
2009	150399625743.68954
2010	186390189242.8823
2011	204095956295.5248
2012	232847959248.88712
2013	272367689184.3604
2014	310938468443.96985
2015	286558062693.46533
2016	241919874793.64853
2017	209683766283.04675
2018	219376321268.1349
2019	235978577435.2691
2020	200480331954.92117
2021	193036305355.3992
2022	208123869590.02585
2023	155159743436.43613