Year	current US$
1960	568000000
1961	485000000
1962	401000000
1963	522000000
1964	539000000
1965	605000000
1966	605000000
1967	566000000
1968	622000000
1969	745000000
1970	762000000
1971	789000000
1972	825000000
1973	1121000000
1974	1516000000
1975	1402000000
1976	1522000000
1977	1708000000
1978	1737000000
1979	1840000000
1980	3046000000
1981	3233000000
1982	3120000000
1983	3215000000
1984	3140000000
1985	3714000000
1986	2934000000
1987	4351000000
1988	5706000000
1989	6764000000
1990	2585000000
1991	3659000000
1992	3051000000
1993	3105000000
1994	3463000000
1995	3435000000
1996	3535000000
1997	3921000000
1998	3130000000
1999	3559000000
2000	5276000000
2001	4825000000
2002	5546000000
2003	7408000000
2004	9661000000
2005	12912000000
2006	16728000000
2007	19224000000
2008	26224000000
2009	23062000000
2010	26438000000
2011	30528000000
2012	29409000000
2013	29018000000
2014	26853000000
2015	21349000000
2016	25468000000
2017	25604000000
2018	27624000000
2019	29000000000
2020	27078000000
2021	41310000000
2022	51280000000
2023	39853000000