Year	current US$
1971	37827844.0429372
1972	33282957.640534304
1973	55043881.60154359
1974	75230555.9068456
1975	103174947.2079741
1976	102320239.0663067
1977	125500472.89722659
1978	187605415.00913918
1979	302396296.20999295
1980	441193501.10354376
1981	394103108.2876812
1982	290918796.9959871
1983	269164584.5137815
1984	237726416.1802071
1985	260041990.47935224
1986	357258726.4630831
1987	536915989.2906239
1988	639854116.082492
1989	627560134.005754
1990	727533906.0385785
1991	787643951.522464
1992	867904512.0561899
1993	899517642.8324798
1994	979757458.1818565
1995	1027548332.538561
1996	1041318023.7363919
1997	1069032502.483153
1998	1152941303.3223057
1999	1192587954.3200862
2000	1075650834.689654
2001	1101276049.956362
2002	1215303392.8682075
2003	1413197331.168873
2004	3502902631.0746584
2005	4122947836.36281
2006	5125917613.643285
2007	6593183317.894485
2008	9791136399.572548
2009	9838742088.222048
2010	10022414934.243612
2011	11304800082.057934
2012	11089295042.095686
2013	12143109959.362692
2014	13328983424.445312
2015	13470579324.449858
2016	13813923116.788998
2017	15696767530.000156
2018	16418497697.875658
2019	19270829727.67286
2020	19241689656.783424
2021	21911770889.28769
2022	21565163165.95142