Year	current US$
1960	39000000
1961	62000000
1962	64000000
1963	90000000
1964	77000000
1965	66000000
1966	71000000
1967	63000000
1968	64000000
1969	66000000
1970	69000000
1971	66000000
1972	106000000
1973	137000000
1974	312000000
1975	298000000
1976	265000000
1977	309000000
1978	325000000
1979	381000000
1980	431000000
1981	332000000
1982	364000000
1983	366000000
1984	372000000
1985	436000000
1986	662000000
1987	884000000
1988	994000000
1989	986000000
1990	1194000000
1991	1195000000
1992	1302000000
1993	1299000000
1994	1347000000
1995	1538000000
1996	1802000000
1997	1592000000
1998	1645000000
1999	1554000000
2000	1557000000
2001	1628000000
2002	1801000000
2003	1898000000
2004	1993000000
2005	2143000000
2006	2329000000
2007	2238000000
2008	2384000000
2009	1939000000
2010	2261000000
2011	2565000000
2012	2649000000
2013	2869000000
2014	3094000000
2015	2662000000
2016	2359000000
2017	2342000000
2018	2366000000
2019	2223000000
2020	1789000000
2021	1962000000
2022	2388000000
2023	2300000000