Year	current US$
1975	3060069787.626954
1976	3474590300.0389867
1977	4329292381.662581
1978	5696772419.04652
1979	6022642805.10446
1980	7148386574.174863
1981	7266224297.517594
1982	8160829032.005745
1983	8806043299.447584
1984	9379191482.520206
1985	8950944836.781668
1986	10514591218.33447
1987	13800480739.400307
1988	19739656964.51672
1989	24600847934.602657
1990	28015454499.415466
1991	33918498269.596443
1992	37916118955.340965
1993	46323289032.94714
1994	52516763744.72796
1995	60606611764.64979
1996	63336635322.00549
1997	48440101802.630424
1998	36084891009.5675
1999	38577409372.207405
2000	38906172930.317535
2001	33954293405.41592
2002	37743779266.94024
2003	42598735114.49978
2004	48237004200.11044
2005	53465321664.16917
2006	67514642119.94473
2007	84798559175.24681
2008	89344012449.78935
2009	82468141151.36266
2010	101061123955.88011
2011	116563025286.12296
2012	115018837068.78362
2013	114418045353.82922
2014	111957456811.66467
2015	112538809394.56651
2016	124326148567.80472
2017	145771625623.9713
2018	160573102705.77814
2019	172444697665.4425
2020	140884599162.17078
2021	139382952378.6512
2022	132160631309.77884
2023	130057915530.1784