Year	current US$
1974	437000000
1975	487000000
1976	501000000
1977	458000000
1978	386000000
1979	552000000
1980	596000000
1981	1144000000
1982	1907000000
1983	1917000000
1984	2192000000
1985	2835000000
1986	2983000000
1987	3801000000
1988	5553000000
1989	6291000000
1990	7882000000
1991	8163000000
1992	9262000000
1993	10518000000
1994	10723000000
1995	14475000000
1996	12852000000
1997	19153000000
1998	23093000000
1999	16126000000
2000	19169000000
2001	15003000000
2002	13978000000
2003	17926000000
2004	22831000000
2005	27502000000
2006	25762000000
2007	29603000000
2008	36652000000
2009	35356000000
2010	35966000000
2011	40750000000
2012	48938000000
2013	65122000000
2014	68398000000
2015	61094000000
2016	50473000000
2017	58381000000
2018	64692000000
2019	70869000000
2020	38774000000
2021	62303000000
2022	92534000000
2023	101145000000