Year	current US$
1970	2325059089.41729
1971	2295485819.07567
1972	2802224658.57551
1973	3464580902.3882
1974	3717274965.53589
1975	4585035672.65546
1976	4848601813.63209
1977	5294999966.52981
1978	6255596048.6887
1979	7030999503.16066
1980	8405884627.38792
1981	7638607915.62984
1982	6703665590.679
1983	6036019597.76186
1984	6066748135.10964
1985	6227435906.97239
1986	8256761471.16626
1987	9721619667.84433
1988	10783923234.4301
1989	10479135067.2416
1990	12771237801.5814
1991	14083245650.1034
1992	13875206778.9072
1993	10737249531.0533
1994	17633525653.9762
1995	20980058136.3248
1996	23528299198.292
1997	21004922964.3503
1998	19122505796.2332
1999	18770464018.0403
2000	17715503811.3335
2001	16040884937.7649
2002	17305758102.0655
2003	21489082732.6064
2004	25909942413.1503
2005	25722065889.6576
2006	25870828277.8998
2007	28840112593.9516
2008	31330246544.5828
2009	28459555057.6184
2010	31117085078.5678
2011	35266238330.0745
2012	40011489311.4026
2013	42402785192.9293
2014	41824719235.7562
2015	35686948941.3059
2016	37370010748.3547
2017	39235013056.035
2018	40241823238.3687
2019	38905550769.591
2020	40077851125.0093
2021	46291445351.8589