Year	current US$
1960	166760000
1961	172760000
1962	189750000
1963	435750000
1964	506750000
1965	653000000
1966	678500000
1967	692500000
1968	542500000
1969	487500000
1970	542500000
1971	1327371532.52958
1972	2383371532.52958
1973	3747412570.16758
1974	14152843235.135
1975	23193203275.3134
1976	26899744713.7395
1977	29902782764.0673
1978	19199736056.7885
1979	19273285270.7714
1980	23436628348.1999
1981	32235807579.9495
1982	29549136703.4032
1983	27287382672.7011
1984	24748425029.2205
1985	25003871265.3779
1986	18323887881.7902
1987	22684381307.7218
1988	20552705642.5025
1989	16747561936.5522
1990	11667672418.9441
1991	11673288603.7563
1992	5935001402.50526
1993	7428116974.24464
1994	7377501507.29267
1995	8621622055.27346
1996	14320641791.0019
1997	14876422396.4855
1998	14220171876.122
1999	16996932206.1349
2000	19585482511.0682
2001	17595731322.4819
2002	20610452358.2289
2003	22619992815.334
2004	27290843020.4748
2005	155028930400.961
2006	226035207816.288
2007	305455432097.369
2008	442249494002.857
2009	409693597286.328
2010	444721715565.439
2011	540676567556.256
2012	656464467218.359
2013	725291597428.29
2014	731920183443.462
2015	615985084477.742
2016	535364240227.221
2017	495990427423.656
2018	496156104403.823
2019	499143226682.302
2020	453208226719.746
2021	454984332198.836
2022	459406935144.35
2023	436526608169.088