Year	current US$
1960	1249000000
1961	1460000000
1962	1357000000
1963	981000000
1964	1077000000
1965	1199000000
1966	1124000000
1967	1096000000
1968	1169000000
1969	1576000000
1970	1694000000
1971	1868000000
1972	1905000000
1973	2230000000
1974	3635000000
1975	3947000000
1976	3033000000
1977	4162000000
1978	3834000000
1979	6700000000
1980	10541000000
1981	9430000000
1982	5337000000
1983	4504000000
1984	4585000000
1985	3814000000
1986	4724000000
1987	5818000000
1988	5322000000
1989	4203000000
1990	4076000000
1991	8275000000
1992	14872000000
1993	16784000000
1994	21527000000
1995	20122000000
1996	23762000000
1997	30450000000
1998	31404000000
1999	25508000000
2000	25154000000
2001	20320000000
2002	8990000000
2003	13834000000
2004	22445000000
2005	28689000000
2006	34152000000
2007	44706000000
2008	57462000000
2009	38786000000
2010	56793000000
2011	74319000000
2012	67974000000
2013	74442000000
2014	65735000000
2015	60205000000
2016	55852000000
2017	66937000000
2018	65482000000
2019	49124000000
2020	42354000000
2021	63185000000
2022	81522000000
2023	73715000000