Year	current US$
1960	182000000
1961	170000000
1962	213000000
1963	226000000
1964	197000000
1965	195000000
1966	203000000
1967	213000000
1968	233000000
1969	248000000
1970	298000000
1971	328000000
1972	357000000
1973	434000000
1974	350000000
1975	438000000
1976	554000000
1977	661000000
1978	518000000
1979	535000000
1980	543000000
1981	657000000
1982	498000000
1983	624000000
1984	629000000
1985	374000000
1986	333000000
1987	504000000
1988	509000000
1989	672000000
1990	374000000
1991	305000000
1992	319000000
1993	417000000
1994	503000000
1995	556000000
1996	620000000
1997	594000000
1998	596000000
1999	780000000
2000	1807000000
2001	1699000000
2002	1949000000
2003	2542000000
2004	3778000000
2005	4824000000
2006	5657000000
2007	8879000000
2008	11671000000
2009	8257000000
2010	11404000000
2011	10193000000
2012	4066000000
2013	4790000000
2014	4350000000
2015	3169000000
2016	3094000000
2017	4100000000
2018	3478000000
2019	3735000000
2020	3803000000
2021	5027000000
2022	4357000000
2023	4780000000