Year	current US$
1960	18940000
1961	20740000
1962	34510000
1963	34410000
1964	49210000
1965	68810000
1966	88710000
1967	88070000
1968	44360000
1969	59760000
1970	97960000
1971	196953721.299011
1972	324853721.299011
1973	472438404.00837
1974	1278779274.2088
1975	1201657395.05357
1976	1302637357.53348
1977	1568757397.60308
1978	1834870374.42738
1979	1531465755.95693
1980	1588205525.09732
1981	1516369834.96214
1982	2608112387.90665
1983	1902514181.03933
1984	671561118.045914
1985	1073816432.33743
1986	488025337.296491
1987	367936835.534622
1988	977818288.005813
1989	938168478.460851
1990	659919197.336786
1991	1275464679.79802
1992	1496426395.97398
1993	2260307073.28081
1994	3884169190.93785
1995	4533332055.45183
1996	5931870344.18894
1997	5976350366.99624
1998	6556252940.30681
1999	7775632525.38118
2000	5943660563.32523
2001	5013809926.9086
2002	7243825141.93422
2003	12519443025.1835
2004	11734571067.1426
2005	11887084571.4448
2006	13376441661.3303
2007	12909941415.2772
2008	20244477609.5729
2009	29102898320.779
2010	31514110354.516
2011	33740586419.4963
2012	37185578898.8942
2013	36748028547.6784
2014	39547131616.6926
2015	38756070536.9734
2016	43338023085.564
2017	43455209096.3304
2018	40561232242.3956
2019	38168378574.221
2020	25000678886.5713
2021	18454257135.7146
2022	15799388321.5268