Year	current US$
1975	434000000
1976	420000000
1977	630000000
1978	693000000
1979	970000000
1980	1492000000
1981	1676000000
1982	1308000000
1983	1116000000
1984	1114000000
1985	999600000
1986	1423400000
1987	1412600000
1988	1691100000
1989	1906710000
1990	1982210000
1991	1990200000
1992	2420300000
1993	2624900000
1994	2869900000
1995	3524000000
1996	3558734100
1997	3977556406.58454
1998	4335173603.33474
1999	4527000986.28191
2000	4726488891.21907
2001	4920242510.1621
2002	5004905998.59316
2003	5160446617.416537
2004	6452571319.376188
2005	7725222753.2837925
2006	8694551674.211662
2007	9801219799.404436
2008	11877951094.9997
2009	10291422979.132433
2010	12979139389.881664
2011	15674625354.546167
2012	15212787218.414347
2013	15762502175.50496
2014	15092267856.919617
2015	13828685003.613968
2016	13815280931.210262
2017	14509346383.26643
2018	16182182537.593184
2019	16133750360.53414
2020	12694312396.865738
2021	18001136400.017067
2022	23708728777.19168
2023	20151791580.34741