Year	current US$
1960	668000000
1961	700000000
1962	743000000
1963	916000000
1964	953000000
1965	934000000
1966	1071000000
1967	792000000
1968	666000000
1969	638000000
1970	787000000
1971	920000000
1972	899000000
1973	915000000
1974	2351000000
1975	3934000000
1976	3807000000
1977	4815000000
1978	6727000000
1979	3837000000
1980	4860000000
1981	8782000000
1982	9078000000
1983	10275000000
1984	10766000000
1985	11104000000
1986	11502000000
1987	16225000000
1988	23298000000
1989	18774000000
1990	9216000000
1991	7862000000
1992	8245000000
1993	8214000000
1994	10185000000
1995	11739000000
1996	13019000000
1997	13211000000
1998	16166000000
1999	16022000000
2000	14578000000
2001	13376000000
2002	12770000000
2003	12950000000
2004	15950000000
2005	22449000000
2006	27300000000
2007	37100000000
2008	48382000000
2009	44946000000
2010	52923000000
2011	58903000000
2012	69200000000
2013	66180000000
2014	66786000000
2015	63574000000
2016	55789000000
2017	61627000000
2018	72000000000
2019	70991000000
2020	60488000000
2021	74453000000
2022	95670000000
2023	78895000000