Year	current US$
1974	2274967828.935496
1975	1885317268.7410963
1976	3103193885.6701574
1977	3580246565.3169627
1978	4513303295.659211
1979	7074896205.394788
1980	7179531467.980048
1981	6312157543.529928
1982	6412627941.869958
1983	8001292407.110249
1984	9724608106.538132
1985	7995434633.170276
1986	7105718439.344424
1987	9991911526.259981
1988	11165491730.510729
1989	11918746108.447475
1990	13375849161.236656
1991	14388259661.272915
1992	18754027764.12069
1993	23221365178.82984
1994	26135510166.294014
1995	30065128218.340527
1996	37357567573.12682
1997	37022515636.62899
1998	28758141411.782475
1999	30318578947.36842
2000	33686815789.47369
2001	29924473684.210526
2002	33011868421.05263
2003	38408447368.42105
2004	43833842105.26316
2005	52843275116.20653
2006	63118860531.719765
2007	75033056908.96089
2008	88903343680.8358
2009	67480047279.66804
2010	85345397130.2211
2011	101547300710.06721
2012	97211167120.13286
2013	95107351620.04445
2014	99278406156.57167
2015	85582327194.40874
2016	85511531000.21297
2017	90422713372.9549
2018	93745514738.38953
2019	89637073451.07355
2020	80385640291.76067
2021	97161064941.72229
2022	108223727059.01265