Year	current US$
1987	64904761904.76191
1988	74842105263.1579
1989	80731578947.36842
1990	79523809523.80952
1991	76666666666.66667
1992	73906020558.00294
1993	65648189143.717354
1994	52549580264.80642
1995	48213856468.571815
1996	44558831005.062126
1997	50151531591.731674
1998	41882523345.18044
1999	31580639553.82983
2000	32375083934.824116
2001	39309580983.228165
2002	43956163612.043274
2003	52010355753.04612
2004	67220154164.316605
2005	89238865118.52626
2006	111884752475.24753
2007	148733861386.1386
2008	188110390659.51477
2009	121552153444.12442
2010	141209170427.2334
2011	169333835201.5541
2012	182591753827.94882
2013	190498811460.02753
2014	133503871861.7233
2015	91030967789.07175
2016	93355869403.92232
2017	112090505081.73862
2018	130891088293.54999
2019	153883047509.57697
2020	156617722013.3422
2021	199765859570.9353
2022	161989520721.1905
2023	178757021386.80896