Year	current US$
1978	209900000
1979	386200000
1980	449000000
1981	456300000
1982	257600000
1983	254900000
1984	343600000
1985	375500000
1986	405900000
1987	394130000
1988	338670000
1989	425490000
1990	459890000
1991	590120000
1992	821840000
1993	1019860000
1994	1323900000
1995	1309100000
1996	1388300000
1997	1413200000
1998	1308500000
1999	1234500000
2000	1248578030.6
2001	1099370494.19685
2002	744738395.79098
2003	745679758.476909
2004	1085667486.64107
2005	1285207020.08762
2006	1360780950.4943001
2007	1803878516.4527
2008	2240797714.285436
2009	2283037530.957686
2010	2653668658.495296
2011	3607165331.622756
2012	5140934067.320751
2013	5029256090.923266
2014	4896459427.090337
2015	5116189082.820621
2016	4831868839.444551
2017	5665988226.895918
2018	5444522169.409842
2019	5334207835.143397
2020	3722608251.916967
2021	3727031993.0631766
2022	5509565225.76053
2023	6148677068.332911