Year	current US$
1977	130000000
1978	160000000
1979	200000000
1980	220000000
1981	240000000
1982	330000000
1983	320000000
1984	290000000
1991	1298408203
1992	1371243774
1993	1574901367
1994	1582775146
1995	1820253784
1996	3035564720.87487
1997	3118271084.0735
1998	2913909321.22201
1999	3032998092.19385
2000	2530781278.38592
2001	2345078420.98957
2002	2678810110.40657
2003	1504285471.72806
2004	1212182602.77513
2005	1149537316.72015
2006	3332164588.64828
2007	3639371943.36539
2008	4548088347.38379
2009	3932046367.46307
2010	4365714732.55966
2011	4536170392.33335
2012	4042571070.64493
2013	2872330559.77684
2014	4214761758.33123
2015	4000341421.20351
2016	5066869685.05946
2017	5282863264.3456
2018	6150517742.84918
2019	6827885453.32526
2020	8245330486.37685
2021	6133593629.67698
2022	4521943147.01802