Year	current US$
1960	30000000
1961	32000000
1962	38000000
1963	42000000
1964	48000000
1965	47000000
1966	51000000
1967	43000000
1968	50000000
1969	60000000
1970	65000000
1971	75000000
1972	104000000
1973	158000000
1974	134000000
1975	161000000
1976	161000000
1977	198000000
1978	249000000
1979	351000000
1980	544000000
1981	711000000
1982	719000000
1983	727000000
1984	795000000
1985	778000000
1986	879000000
1987	1120000000
1988	1288000000
1989	1480000000
1990	1539000000
1991	1852000000
1992	1968000000
1993	2025000000
1994	2001000000
1995	2042000000
1996	2000000000
1997	2082000000
1998	1955000000
1999	2040000000
2000	2625000000
2001	2824000000
2002	3009000000
2003	3232000000
2004	4094000000
2005	4514000000
2006	5236000000
2007	6045000000
2008	5880000000
2009	4751000000
2010	5629000000
2011	7927000000
2012	8982000000
2013	10140000000
2014	11262000000
2015	10603000000
2016	8924000000
2017	9451000000
2018	11162000000
2019	11167000000
2020	11588000000
2021	19219000000
2022	17338000000
2023	17541000000