Year	current US$
1960	11000000
1961	14000000
1962	17000000
1963	21000000
1964	22000000
1965	21000000
1966	24000000
1967	25000000
1968	28000000
1969	37000000
1970	42000000
1971	49000000
1972	72000000
1973	100000000
1974	110000000
1975	133000000
1976	188000000
1977	219000000
1978	258000000
1979	389000000
1980	613000000
1981	686000000
1982	722000000
1983	763000000
1984	913000000
1985	906000000
1986	1046000000
1987	1402000000
1988	1505000000
1989	1643000000
1990	1701000000
1991	1665000000
1992	1766000000
1993	1787000000
1994	1866000000
1995	1997000000
1996	1996000000
1997	2148000000
1998	2141000000
1999	2200000000
2000	2539000000
2001	2300000000
2002	2356000000
2003	2581000000
2004	2812000000
2005	2476000000
2006	2557000000
2007	2543000000
2008	1997000000
2009	961000000
2010	870000000
2011	869000000
2012	1021000000
2013	1138000000
2014	1241000000
2015	1339000000
2016	1257000000
2017	1406000000
2018	1510000000
2019	1586000000
2020	1353000000
2021	1620000000
2022	1677000000
2023	1654000000