Year	current US$
1971	704299919.082843
1972	743715634.16035
1973	907511684.423214
1974	1271221355.12488
1975	1341537111.74421
1976	1555093786.24541
1977	1919363575.89065
1978	1783894289.2646
1979	1268377654.13925
1980	1856372857.88243
1981	2042387598.02294
1982	2078659149.12434
1983	2317762637.55181
1984	2635209597.12469
1985	2253038321.16204
1986	2549021289.65417
1987	3524372167.84897
1988	2056720592.49245
1989	721496267.14558
1990	909023989.711103
1991	1042587713.98742
1992	1159042452.49665
1993	1189812781.70364
1994	3098785124.05965
1995	3435701204.52138
1996	3646047083.59606
1997	3778716302.17706
1998	4085029414.96265
1999	4261208768.29011
2000	4511311696.08305
2001	4654958743.70511
2002	4597003668.32467
2003	4691342198.21808
2004	5124812488.13099
2005	5679925847.11964
2006	6011700886.62039
2007	6636411752.06411
2008	7611667579.50322
2009	7412524596.88938
2010	7729337401.05059
2011	8549272796.65043
2012	9110334739.41816
2013	9423835485.04003
2014	10404076679.1741
2015	11174210329.1839
2016	11504908947.0769
2017	11916954744.0839
2018	11286468900.7733
2019	11108606150.7157
2020	10689526409.7937
2021	11611573902.2831