Year	current US$
1970	9000000
1971	10000000
1972	22000000
1973	25000000
1974	17000000
1975	24000000
1976	47000000
1977	70000000
1978	58000000
1979	39000000
1980	79000000
1981	77000000
1982	84000000
1983	76000000
1984	84000000
1985	89000000
1986	94000000
1987	101000000
1988	86000000
1989	89000000
1990	102000000
1991	91000000
1992	98000000
1993	78000000
1994	80000000
1995	70000000
1996	60000000
1997	56000000
1998	65199999.64721503
1999	34639999.7938424
2000	32520000.18022953
2001	48010000.79326333
2002	95540000.80190603
2003	95249999.93480748
2004	126140000.26695423
2005	98149999.31305656
2006	153370001.2918561
2007	190290001.88037762
2008	413209996.98713374
2009	432409991.3090464
2010	370110001.33864516
2011	410460002.0982326
2012	414229997.57342106
2013	502039999.1665039
2014	347129991.24079907
2015	228709998.2332439
2016	295240000.90360653
2017	355310001.29692256
2018	312730001.0956823
2019	235099998.57842928
2020	347489997.00695276
2021	358729999.7787921
2022	336520001.3797729