Year	current US$
1970	287784287.7842878
1971	355710438.35008824
1972	447334665.15335923
1973	689138461.7848437
1974	2359350585.195318
1975	2402869298.400266
1976	3017333735.6781354
1977	3169473558.714196
1978	3635946168.330367
1979	5167061146.336454
1980	8370160244.814898
1981	9196263818.681318
1982	8144697939.560439
1983	6926593681.318681
1984	7073076895.604395
1985	6721703104.395604
1986	5676923214.285714
1987	5925000164.835165
1988	6339176098.901098
1989	6685906428.571428
1990	7581428736.263736
1991	7083516620.879121
1992	7868956126.373626
1993	7365109862.6373625
1994	7589314670.32967
1995	8375020302.197802
1996	9323296071.428572
1997	11626977609.89011
1998	10174725796.703297
1999	12274175824.175823
2000	16360439560.43956
2001	16834615384.615383
2002	18466483516.483517
2003	23117307692.30769
2004	29492307692.30769
2005	38814835164.83517
2006	57601648351.648346
2007	75473076923.07692
2008	108507967032.96703
2009	88385714285.71428
2010	112178571428.57143
2011	154504256813.1868
2012	174708777087.91208
2013	188363906703.2967
2014	196924049120.87912
2015	158174570961.53845
2016	150622841208.7912
2017	160679616730.76923
2018	179589624148.35165
2019	171961652307.6923
2020	141366857857.14285
2021	176969097472.52747
2022	227481667471.16373