Year	current US$
1970	1097093.4057764
1971	1287296.8054875
1972	1894310.67567041
1973	2346925.40522664
1974	9920638.32070196
1975	172110539.561906
1976	350139896.472675
1977	384311704.013337
1978	640734551.131586
1979	1789032511.10082
1980	3204591464.21002
1981	2278097800.74349
1982	1440599999.0787
1983	2300865686.93786
1984	2813856657.25982
1985	2921778734.36283
1986	1323325369.42532
1987	2372612704.81571
1988	2025044602.31262
1989	4617873583.42748
1990	6996518053.81559
1991	4103072755.8396
1992	5064798432.11433
1993	5333429310.99408
1994	5471833232.61239
1995	6638000597.26334
1996	10661048448.527
1997	8645113934.47991
1998	2448332653.63704
1999	7262023729.25642
2000	17603243832.7724
2001	14002816607.5084
2002	14350967141.9009
2003	16203765928.3169
2004	20910608576.8892
2005	26833776257.7374
2006	30699963139.5553
2007	31013511093.785
2008	47395361038.0225
2009	25857404222.8652
2010	26058222673.8206
2011	39678128924.9223
2012	37025673128.765
2013	32896797468.9925
2014	29500004459.4118
2015	15172823789.7782
2016	11104329917.8686
2017	16592420225.7534
2018	24588758697.0859
2019	19122945404.4843
2020	11982864469.5036
2021	38819067674.8327