Year	current US$
1960	75000000
1961	78000000
1962	94000000
1963	82000000
1964	92000000
1965	92000000
1966	98000000
1967	104000000
1968	116000000
1969	111000000
1970	145000000
1971	147000000
1972	166000000
1973	203000000
1974	244000000
1975	301000000
1976	275000000
1977	338000000
1978	388000000
1979	394000000
1980	401000000
1981	316000000
1982	308000000
1983	263000000
1984	334000000
1985	274000000
1986	315000000
1987	331000000
1988	274000000
1989	316000000
1990	319000000
1991	335000000
1992	327000000
1993	335000000
1994	450000000
1995	507000000
1996	509000000
1997	516000000
1998	538000000
1999	584000000
2000	824000000
2001	928000000
2002	486000000
2003	856000000
2004	992000000
2005	855000000
2006	985000000
2007	1238000000
2008	1310000000
2009	1052000000
2010	1149000000
2011	1590000000
2012	1516000000
2013	1923000000
2014	2196000000
2015	2048000000
2016	2254000000
2017	2848000000
2018	3110000000
2019	2696000000
2020	2026000000
2021	2726000000
2022	3721000000
2023	3213000000