Year	current US$
1970	2184000000
1971	2250000000
1972	1994000000
1973	1737000000
1974	1878000000
1975	1899000000
1976	1468000000
1977	1460000000
1978	1811000000
1979	2060000000
1980	2648000000
1981	2681000000
1982	3155000000
1983	3631000000
1984	4109000000
1985	4899000000
1986	4333000000
1987	4018000000
1988	3636000000
1989	3635000000
1990	5756000000
1991	8109000000
1992	4387000000
1993	5284000000
1994	5390000000
1995	3773000000
1996	3199000000
1997	2745000000
1998	3410140003.3477707
1999	5452869994.649663
2000	5195650027.481837
2001	6114040032.509717
2002	8212649966.927248
2003	11591889899.142094
2004	11475119929.233572
2005	20261460070.87268
2006	15856599794.916813
2007	13428400180.8595
2008	16423950069.917376
2009	17594289972.482258
2010	17329610005.56872
2011	19093890104.454018
2012	16990230150.576685
2013	17308549888.05577
2014	16943710056.91216
2015	16841979756.100115
2016	17150239996.500317
2017	18635680023.854603
2018	18876440048.94235
2019	17921509942.339737
2020	20029200079.50814
2021	23017719948.62333
2022	29373909819.774338