Year	current US$
1960	84000000
1961	96000000
1962	102000000
1963	128000000
1964	116000000
1965	134000000
1966	131000000
1967	177000000
1968	188000000
1969	204000000
1970	242000000
1971	251000000
1972	303000000
1973	334000000
1974	437000000
1975	599000000
1976	613000000
1977	735000000
1978	1056000000
1979	1275000000
1980	1602000000
1981	1427000000
1982	1211000000
1983	1224000000
1984	1112000000
1985	1151000000
1986	1704000000
1987	1723000000
1988	1274000000
1989	1261000000
1990	1400000000
1991	1173000000
1992	1163000000
1993	1102000000
1994	1083000000
1995	1199000000
1996	1227000000
1997	1359000000
1998	1495000000
1999	1318000000
2000	1489000000
2001	1852000000
2002	1866000000
2003	2163000000
2004	2406000000
2005	2735000000
2006	3150000000
2007	4657000000
2008	5686000000
2009	4442000000
2010	5133000000
2011	6800000000
2012	6515000000
2013	6649000000
2014	7553000000
2015	6045000000
2016	5206000000
2017	4796000000
2018	5656000000
2019	6583000000
2020	5521000000
2021	6981000000
2022	7874000000
2023	9000000000