Year	current US$
1968	1296023546.3543117
1969	1234844955.91243
1970	1282437206.1667302
1971	1323095179.3514688
1972	1598995147.107424
1973	1823256924.181915
1974	2049389332.4079614
1975	2754472119.4104505
1976	2808760927.525013
1977	2883707131.432482
1978	3204308240.7432275
1979	4005478436.5525117
1980	4410208080.28491
1981	3986593365.0308785
1982	3898346606.6301546
1983	3466555055.565225
1984	3358564465.7495627
1985	3691845755.8229656
1986	5226996260.219693
1987	6289050834.354057
1988	6200218083.8959465
1989	6161338281.045785
1990	7194170821.310906
1991	7060308334.029494
1992	7637218742.1853695
1993	7176887981.727275
1994	4892478446.543975
1995	6171478877.507269
1996	6486796863.813158
1997	5969413839.484454
1998	6449709984.176249
1999	6500060810.106662
2000	5922366536.584255
2001	6429937402.60184
2002	6904222260.129977
2003	8674435366.954018
2004	9986497896.097128
2005	10919437893.676424
2006	11634425951.636658
2007	13920278782.99205
2008	16805895461.565664
2009	15975441977.422678
2010	15971192907.043049
2011	17532438785.720726
2012	17359552048.49499
2013	18595820748.99494
2014	19408861677.05095
2015	17312461398.556427
2016	18541862786.77093
2017	20409580182.439972
2018	22515158389.217777
2019	22793623628.474106
2020	24122233479.25216
2021	26818952801.84455
2022	26730995883.942173
2023	29980964258.481663