Year	current US$
1975	237000000
1976	278000000
1977	379000000
1978	437000000
1979	729000000
1980	1218000000
1981	1118000000
1982	886000000
1983	756000000
1984	620000000
1985	656720000
1986	999160000
1987	1005700000
1988	1037800000
1989	1478250000
1990	1785700000
1991	2060200000
1992	2284800000
1993	2443400000
1994	2763900000
1995	3248900000
1996	3495258163.34284
1997	3799737934.79738
1998	3859590069.87113
1999	3780415979.94565
2000	3994866402.75766
2001	4071078254.65743
2002	4316904836.122564
2003	4723290536.767324
2004	5650409435.09188
2005	6525477934.056635
2006	7183215750.685282
2007	8283439548.287398
2008	9777632632.678633
2009	7766820704.287528
2010	9888715414.021355
2011	11615665760.472744
2012	10907228948.819426
2013	10629711175.960007
2014	9316533981.861969
2015	8176547809.532359
2016	8176124281.308453
2017	8771595648.343866
2018	8818601712.933403
2019	8131083035.643838
2020	5270218965.750024
2021	5584267843.205715
2022	8224529445.636488
2023	9498280562.679365