Year	current US$
1968	21794527062.190666
1969	23905736442.408207
1970	27225634835.266224
1971	30061136669.554108
1972	34529978915.87028
1973	39624210586.18649
1974	50115184319.11037
1975	67575454011.59479
1976	79567759282.80232
1977	105185217682.91899
1978	123699392615.11452
1979	151291553464.63303
1980	182498970347.105
1981	201120487548.7341
1982	225899264620.6826
1983	234547645060.59647
1984	248616792966.61862
1985	253018436263.69885
1986	257640458074.05258
1987	267787143624.7943
1988	272296321156.1053
1989	309881809065.1952
1990	385622341488.1942
1991	295369077950.1993
1992	275981312874.46405
1993	301905738731.9785
1994	310154495590.81805
1995	321669550062.2959
1996	334535775616.6876
1997	353623007329.22955
1998	361240738772.5627
1999	367968764078.84656
2000	372108837186.2354
2001	374570245570.7229
2002	379803045585.4407
2003	404229807160.5696
2004	456048123234.46906
2005	512148513982.9129
2006	596604937989.4603
2007	721956916347.1135
2008	875232912644.8783
2009	890780012429.5891
2010	937243295422.4951
2011	1022660516869.5745
2012	1123088023598.0073
2013	1183339587872.7559
2014	1289594093475.524
2015	1290343205988.942
2016	1309672540563.511
2017	1296652821747.0303
2018	1348914359919.8962
2019	1423954183774.5146
2020	1397541787053.6873
2021	1508678697134.612
2022	1626697290843.717
2023	1659030621141.0317