Year	current US$
1970	1048053597.87648
1971	1156108942.9968
1972	1333062199.25216
1973	1634829115.62298
1974	2124602169.5417
1975	2585547250.50918
1976	2605913189.04192
1977	2390144129.49621
1978	2990327774.13933
1979	3918209215.97642
1980	5762350308.69566
1981	8630714804.08162
1982	6376872260.63829
1983	3822933412.98918
1984	4528811084.62455
1985	4841804234.33242
1986	3302793399.47695
1987	3518488356.18923
1988	4010409121.66204
1989	4688165871.62299
1990	5557808846.04992
1991	7308833627.08721
1992	10253319727.7457
1993	13206061634.9981
1994	18030496776.3918
1995	12828470008.8793
1996	19210979333.8804
1997	24220657453.0306
1998	17442284712.7846
1999	20905145885.4441
2000	28470359484.1787
2001	32157776338.3963
2002	34828133938.7324
2003	36678541864.195
2004	36372056690.4129
2005	41669106786.1239
2006	45042655306.3528
2007	48541090980.0883
2008	52309084844.8746
2009	45042908313.5457
2010	52365560903.2287
2011	58551883209.3888
2012	59082344446.2729
2013	57220904637.9771
2014	66183884581.5072
2015	59407164319.1111
2016	51169849046.4612
2017	51097236314.6291
2018	50896791584.221
2019	52722500528.8768
2020	45139872762.2805
2021	53035474843.0926