Year	current US$
1970	221692683.011711
1971	241861558.970222
1972	256752939.053245
1973	285869848.991813
1974	268641287.003982
1975	335460491.553956
1976	404328335.626127
1977	474896840.326535
1978	515279450.256084
1979	684331380.624419
1980	904737114.245061
1981	958158648.208875
1982	1359870308.93854
1983	1561460362.21098
1984	1731158900.75455
1985	2031829200.84988
1986	2149234626.95102
1987	2156884965.11011
1988	2077935760.08215
1989	2385119298.03254
1990	2557351818.04303
1991	2220717838.79499
1992	2579756824.03263
1993	2865456871.33566
1994	3298415648.26372
1995	3878014978.48883
1996	4336111601.68487
1997	4853525986.25255
1998	5198951705.04893
1999	6235456830.98584
2000	6194979660.67503
2001	4841666052.86297
2002	4434253293.74269
2003	4159871769.8647
2004	4453311052.62823
2005	5155974320.41439
2006	6104875094.31203
2007	7976103268.2531
2008	10236555806.1309
2009	12567672922.4737
2010	13961097974.1498
2011	13944213728.871
2012	13726468418.0574
2013	14668796410.6832
2014	15888033141.1017
2015	16731908438.2297
2016	19761521258.6673
2017	14120841879.4345
2018	13845909877.3394
2019	17980886126.8233
2020	21655164237.8904
2021	23945188546.3341