Year	current US$
1960	17000000
1961	18000000
1962	21000000
1963	31000000
1964	32000000
1965	43000000
1966	54000000
1967	56000000
1968	55000000
1969	62000000
1970	71000000
1971	78000000
1972	82000000
1973	108000000
1974	178000000
1975	195000000
1976	183000000
1977	165000000
1978	196000000
1979	232000000
1980	369000000
1981	391000000
1982	325000000
1983	304000000
1984	240000000
1985	179000000
1986	280000000
1987	423000000
1988	468000000
1989	502000000
1990	556000000
1991	591000000
1992	639000000
1993	680000000
1994	781000000
1995	866000000
1996	856000000
1997	962000000
1998	973000000
1999	937000000
2000	910000000
2001	1054000000
2002	1029000000
2003	1638000000
2004	1949000000
2005	1640000000
2006	1660000000
2007	1740000000
2008	1570000000
2009	1660000000
2010	1800000000
2011	1910000000
2012	1926000000
2013	1895000000
2014	2004000000
2015	1812000000
2016	1633000000
2017	1801000000
2018	1842000000
2019	2002000000
2020	1752000000
2021	2068000000
2022	2034000000
2023	1762000000