Year	current US$
1971	1260814593.37629
1972	1382971097.2247
1973	1582946831.96876
1974	1802029018.44577
1975	2055763080.08135
1976	2136397663.45031
1977	2594618785.92416
1978	3091519331.28811
1979	3485059397.00914
1980	3805841368.73102
1981	4279782024.144
1982	4943026463.08307
1983	5344345676.71777
1984	5355825817.84059
1985	5867487496.11464
1986	5805075497.86286
1987	6515624421.85875
1988	5347083054.34079
1989	5182024842.23313
1990	5679559290.27004
1991	6065822529.26653
1992	7123064779.14657
1993	7833108187.12123
1994	8432786277.67843
1995	8352150925.51803
1996	8906896321.83129
1997	9440730622.36212
1998	10194630125.3908
1999	10468221913.4724
2000	10758757937.6735
2001	10896526423.4278
2002	11680260702.482
2003	11830864128.079
2004	12885796125.046
2005	14084717040.9882
2006	15513149842.0319
2007	18557251143.5756
2008	22159458403.9385
2009	24188090487.419
2010	25421213995.2461
2011	30811065356.1846
2012	35559306950.5436
2013	40214085486.1981
2014	42846236178.0528
2015	47414115415.743
2016	50088703129.2518
2017	54241266331.4932
2018	55055132794.2527
2019	56472425762.5738
2020	46755627625.5259
2021	51479784105.6909