Year	current US$
1960	66000000
1961	26100000
1962	36000000
1963	33900000
1964	45500000
1965	93600000
1966	126900000
1967	81300000
1968	162000000
1969	296000000
1970	341810000
1971	170072118.822618
1972	96782291.9517749
1973	121586030.521004
1974	41071541.2322734
1975	55901884.7890494
1976	405093225.425629
1977	426484043.615937
1978	1090091008.20356
1979	1938341156.19323
1980	3123220480.6848
1981	3213342780.09864
1982	1814983046.44886
1983	2036312762.39901
1984	2303197858.25336
1985	2449907557.11775
1986	2351295711.47236
1987	2504229065.52795
1988	3160513762.43086
1989	3628564601.67687
1990	6068481633.49504
1991	7041272432.73398
1992	9167660002.47501
1993	9640284277.16877
1994	13087583380.9487
1995	14139810430.9617
1996	14972572873.552
1997	17573233312.1411
1998	15869277685.6304
1999	14616560436.651
2000	15034915691.0232
2001	14379002580.6192
2002	15341120166.6232
2003	15839589419.0005
2004	15993797155.2013
2005	16929244990.4239
2006	19391964976.6216
2007	16836810886.3296
2008	23072358488.8107
2009	25283487780.7077
2010	27816347186.1978
2011	41931795084.8962
2012	41636110637.5881
2013	41083736988.759
2014	40437851651.6687
2015	38632802606.0315
2016	40484241119.5297
2017	38971297403.7984
2018	39848699139.8114
2019	40643492538.3282
2020	39151178419.4101
2021	51237789009.6881
2022	39088021280.0328
2023	46361054836.8251