Year	current US$
1980	882823764.872997
1981	904528978.442793
1982	1041875526.5429
1983	801449628.049219
1984	908261637.283195
1985	719895443.567348
1986	337489029.493095
1987	547957468.482692
1988	843888996.89866
1989	734791179.689827
1990	443414229.649817
1991	579938746.308748
1992	471131820.296755
1993	606715819.703516
1994	659684949.508888
1995	631784656.51421
1996	719295168.985858
1997	648834937.848521
1998	455102441.819561
1999	517913411.538253
2000	490407989.006319
2001	912341281.46297
2002	1048688957.09791
2003	1103769134.06771
2004	1174000658.43938
2005	1360125944.62324
2006	1586543880.29614
2007	1915090294.01725
2008	2302962087.28223
2009	2268666961.56214
2010	2237782095.13964
2011	2480971831.53967
2012	3423910967.20351
2013	4335850728.80372
2014	4296266934.41116
2015	3571359705.49504
2016	2682110683.55438
2017	3044179636.59637
2018	3304164055.99951
2019	3548194134.61552
2020	3463442966.32605
2021	3449813486.39275