Year	current US$
1971	1145737134.88923
1972	1281086263.53439
1973	1264262694.46736
1974	1968293837.11071
1975	1786836319.22685
1976	1797810577.02274
1977	1752237985.61079
1978	2037843278.51897
1979	2273341656.61852
1980	2662315641.41573
1981	3074709954.8162
1982	3064833391.34332
1983	2421596484.2369
1984	1938978976.04507
1985	1546845933.69059
1986	884480593.467108
1987	1306781251.18784
1988	2270762905.46024
1989	2437463305.63737
1990	2023691092.26614
1991	2226780476.94898
1992	2140186893.73514
1993	2335956820.14706
1994	2693062081.02558
1995	2722179565.34978
1996	2580924752.50915
1997	3153645480.17836
1998	2515558371.81423
1999	2546054912.79615
2000	2578752656.63084
2001	3041415032.9982
2002	3083981478.87746
2003	3507625079.22629
2004	4283725502.98579
2005	5695809136.26698
2006	8275037499.62031
2007	8656610560.84748
2008	12240352038.7584
2009	11250633677.6644
2010	13772324295.4997
2011	16884784694.7916
2012	19827787799.7699
2013	21467318409.5115
2014	21644387557.1153
2015	17062740007.3973
2016	16575472568.3556
2017	19697988843.729
2018	20382855807.4592
2019	18571141529.424
2020	13216267874.3925
2021	11969103804.6004