Year	current US$
1960	373250000
1961	406000000
1962	443916666.6666666
1963	478000000
1964	538583333.3333334
1965	598333333.3333334
1966	662500000
1967	748250000
1968	849333333.3333333
1969	920333333.3333333
1970	1006833333.3333333
1971	1084666666.6666667
1972	1286153846.1538463
1973	1263600000
1974	2101299999.9999998
1975	2405900000
1976	2733350000
1977	3229049999.9999995
1978	3760099999.9999995
1979	4510500000
1980	4450368036.69452
1981	5778487836.53844
1982	5600385567.807593
1983	5414008064.034612
1984	6169304491.537309
1985	5377276656.904499
1986	3959383519.7803597
1987	4347956337.833374
1988	4597611710.021265
1989	4715973437.393705
1990	4867582597.52327
1991	5343262457.102258
1992	5643868748.681265
1993	5734699488.849339
1994	5981222858.82727
1995	6715161732.22658
1996	7396949126.356853
1997	7925736821.4503355
1998	8497494652.125457
1999	8285064434.568255
2000	8397855484.769085
2001	8141516928.394893
2002	7905485146.443515
2003	8082399639.543047
2004	8773451751.512096
2005	9549122905.328524
2006	11451844902.221363
2007	13120108008.347721
2008	16674276285.895582
2009	17339992193.732193
2010	19649723722.103386
2011	23963164696.591965
2012	27084497481.910275
2013	30659338885.672935
2014	32996188017.366135
2015	33000198248.914616
2016	33941126193.921852
2017	37508642170.767006
2018	40287647930.53545
2019	40895322850.94067
2020	36629843806.07815
2021	40406111693.198265
2022	44008282879.884224
2023	45849832906.413895