Year	current US$
1960	465000000
1961	433000000
1962	463000000
1963	446000000
1964	548000000
1965	538000000
1966	507000000
1967	510000000
1968	559000000
1969	607000000
1970	727000000
1971	686000000
1972	808000000
1973	1169000000
1974	1509000000
1975	1465000000
1976	1874000000
1977	2403000000
1978	3010000000
1979	3411000000
1980	3924000000
1981	2916000000
1982	3024000000
1983	3001000000
1984	3462000000
1985	3552000000
1986	5102000000
1987	4642000000
1988	5037000000
1989	5717000000
1990	6721000000
1991	7114000000
1992	6900000000
1993	7116000000
1994	8479000000
1995	10126000000
1996	10587000000
1997	11522000000
1998	10890000000
1999	11575000000
2000	13043000000
2001	12290000000
2002	11911000000
2003	13080000000
2004	16224000000
2005	21190000000
2006	24391000000
2007	29991000000
2008	37626000000
2009	32853000000
2010	39713000000
2011	56915000000
2012	60125000000
2013	58824000000
2014	54857000000
2015	35691000000
2016	31757000000
2017	36897000000
2018	41774000000
2019	39489000000
2020	31008000000
2021	40287000000
2022	56999000000
2023	49545000000