Year	current US$
1960	335650000
1961	356200000
1962	387750000
1963	410200000
1964	457000000
1965	508650000
1966	549950000
1967	598100000
1968	646800000
1969	668000050
1970	723000000
1971	731000000
1972	802996336.5164857
1973	912499493.7502531
1974	1034500000
1975	1124000000
1976	1347999950
1977	1669499950
1978	3097242093.2
1979	3544281976.3
1980	3968160046
1981	4043894878.6
1982	4266503525.6
1983	4476697184.849999
1984	4915311846.5
1985	5278120712.5
1986	5677828959
1987	6190521241.5
1988	5902717091.416308
1989	5432344901.724138
1990	4923009551.55642
1991	4648668478.567533
1992	4943700431.073683
1993	4926728932.950691
1994	4642280682.142518
1995	5347445005.213764
1996	5215028986.486486
1997	5737099650.190114
1998	6366340265.878878
1999	6414520529.616725
2000	7186638029.058749
2001	7651162302.345604
2002	7858255412.860379
2003	8230391346.672281
2004	8869299234.337696
2005	9757012696.562117
2006	10917477066.142908
2007	12361257680.562687
2008	13881731875.746613
2009	14587496229.18111
2010	15839344591.984165
2011	17710275685.407448
2012	18528554397.56951
2013	18499729214.904022
2014	19756533971.869846
2015	20979791685.416042
2016	21717604952.183525
2017	23136247990.597725
2018	24067750760.49897
2019	24882225741.811867
2020	23352232483.75501
2021	28144331506.614887
2022	31426041806.798485
2023	34400509852.04365