Year	current US$
1960	60000000
1961	66000000
1962	67000000
1963	80000000
1964	96000000
1965	123000000
1966	149000000
1967	179000000
1968	177000000
1969	221000000
1970	302000000
1971	356000000
1972	332000000
1973	356000000
1974	518000000
1975	592000000
1976	502000000
1977	642000000
1978	770000000
1979	903000000
1980	1176000000
1981	1261000000
1982	1170000000
1983	1120000000
1984	1110000000
1985	1008000000
1986	1080000000
1987	1165000000
1988	1393000000
1989	1530000000
1990	1193000000
1991	1614000000
1992	1485000000
1993	1299000000
1994	1522000000
1995	1452000000
1996	1741000000
1997	1711000000
1998	1240000000
1999	1188000000
2000	1151000000
2001	1071000000
2002	1137000000
2003	1367000000
2004	1680000000
2005	1729000000
2006	1984000000
2007	2622000000
2008	3117000000
2009	2867000000
2010	3524000000
2011	4272000000
2012	4755000000
2013	5410000000
2014	4000000000
2015	2551000000
2016	2068000000
2017	3059000000
2018	3519000000
2019	4127000000
2020	3661000000
2021	5137000000
2022	5296000000
2023	3019000000