Year	current US$
1981	72128721659.47087
1982	64321750000.979355
1983	57055282037.8102
1984	45139805091.0708
1985	41483915555.042145
1986	41168875246.60974
1987	47087926786.74014
1988	51217921470.687065
1989	51281045907.95902
1990	60473236598.33459
1991	63919044341.25106
1992	59916237278.61691
1993	59574925217.644745
1994	64686933203.59061
1995	83377135115.60652
1996	89147149349.05292
1997	94125999191.41397
1998	90045142775.06874
1999	57765696172.89003
2000	59422597885.87145
2001	56749109548.756805
2002	57986875022.30095
2003	75004972256.53929
2004	90885433175.24739
2005	102189965818.86179
2006	108713683230.67169
2007	122830410915.81601
2008	132730341117.06035
2009	130306121315.16383
2010	143904318384.00476
2011	160376682017.17715
2012	164102125895.3915
2013	181169601276.92145
2014	191489190659.04742
2015	170910221182.356
2016	156472983106.55356
2017	168163297920.79984
2018	189260809373.49457
2019	201768920782.55893
2020	190028268384.76373
2021	223279185354.43896
2022	234851926546.42166
2023	227250978351.4718