Year	current US$
1971	17899999.62
1972	22579916
1973	22540000.92
1974	82323534.75799999
1975	309255813.604239
1976	389016730.3734
1977	551113753.9377
1978	701961140.1380001
1979	960989902.5564549
1980	1492346697.9195468
1981	1624978013.110758
1982	1941805812.905958
1983	2274213690.3375864
1984	1963150317.517328
1985	1852580064.7375572
1986	1958289612.6532702
1987	2530055648.241124
1988	2614155376.9342847
1989	2799199174.1939764
1990	4019188526.8283486
1991	3513844989.460619
1992	3973184547.38734
1993	3958326350.312771
1994	4121384245.2712493
1995	4495669771.718946
1996	4431435507.6057
1997	4732155472.189021
1998	5307751921.718765
1999	5789744442.783117
2000	6169358823.970917
2001	6646490476.329833
2002	8499480859.591448
2003	9768051284.92742
2004	10956338327.771242
2005	11829411986.221672
2006	13907975957.477295
2007	16620994422.748896
2008	21819794653.21253
2009	22933521693.84292
2010	26362206371.070347
2011	29709394765.63882
2012	34695988878.692924
2013	37496047483.62695
2014	40599299228.8103
2015	42259655022.63848
2016	40896153599.79479
2017	42364982913.41127
2018	50908516395.38456
2019	55087269064.39555
2020	57789515852.88239
2021	60154351235.61853
2022	61523054182.567696