Year	current US$
1960	344150000
1961	355200000
1962	383450000
1963	404200000
1964	450000000
1965	495550000
1966	534450000.00000006
1967	576900000
1968	623700000
1969	649400050
1970	700400000
1971	706500000
1972	775496460.2659289
1973	879499510.2502449
1974	1021000000
1975	1095000000
1976	1289999950
1977	1600499950
1978	3003742093.2
1979	3415281976.3
1980	3805160046
1981	3884394878.6
1982	4052003525.6
1983	4307697184.849999
1984	4728811846.5
1985	5086120712.5
1986	5467828959
1987	5953021241.5
1988	5658081898.283261
1989	5177172487.931035
1990	4646744960.116732
1991	4366726672.560046
1992	4605571327.2340355
1993	4696798453.062415
1994	4423089120.92094
1995	5083390990.615224
1996	4955806773.648648
1997	5523266950.570342
1998	6156252525.849336
1999	6251771679.442509
2000	6963911560.32849
2001	7392750128.013982
2002	7559838263.027362
2003	7863763890.5120945
2004	8414113886.947772
2005	9300016960.18477
2006	10385040482.221735
2007	11961254505.136253
2008	13474643507.391493
2009	14298648856.05263
2010	15110478377.992178
2011	16768716965.80805
2012	17246974067.094822
2013	17196025367.08294
2014	18168820189.946632
2015	19549522844.99896
2016	20198525790.520504
2017	21719792887.018246
2018	22173255705.373882
2019	22895236635.688484
2020	21695036274.888813
2021	25771440693.968414
2022	28961571884.26274
2023	31872841684.136024