Year	current US$
1960	257500000
1961	270500000
1962	287000000
1963	311500000
1964	349500000
1965	381000000
1966	413000000
1967	432500000
1968	470500000
1969	483500000
1970	534000000
1971	524500000
1972	569997435.0115424
1973	653499673.2501633
1974	766000000
1975	873000000
1976	975000000
1977	1150000000
1978	1288000000
1979	1485000000
1980	1780500000
1981	2036000000
1982	2155000000
1983	2342000000
1984	2513000000
1985	2706000000
1986	2803000000
1987	2958000000
1988	2680257510.729614
1989	2491724137.9310346
1990	2037694552.529183
1991	2072902364.2485
1992	2277233125.3751435
1993	2258559567.8396587
1994	2154171819.9980974
1995	2483733055.265902
1996	2599831081.081081
1997	3013384030.418251
1998	3466026587.88774
1999	3705087108.0139375
2000	5084603916.614024
2001	5546434750.021403
2002	5760282649.121272
2003	6078844467.987652
2004	6557913422.635433
2005	7350185123.018687
2006	8480372378.012457
2007	9615201824.811724
2008	11093947563.230549
2009	11457769474.625696
2010	12373340178.141424
2011	13749772560.781116
2012	14566514120.165623
2013	15156635040.598604
2014	15871143677.481247
2015	16260945743.198677
2016	16700061283.069712
2017	17885775007.233765
2018	19400342086.47649
2019	20447045007.456383
2020	18897353705.357212
2021	23848629211.68664
2022	27409105347.842598
2023	29719457400.555336