Year	constant 2015 US$
1968	37822603054.045456
1969	38125899116.91552
1970	40381830657.58921
1971	42035013750.32692
1972	43399716171.435
1973	41920719184.893654
1974	44861836594.47862
1975	44300789947.80266
1976	48877252131.89516
1977	51584536306.75907
1978	50418312368.32418
1979	49035054697.883766
1980	50515026451.93437
1981	51933352438.3659
1982	56604973622.816315
1983	56003910802.85009
1984	58096904962.3854
1985	61356771617.21142
1986	66449890965.51073
1987	68263628965.55336
1988	71050185792.70049
1989	77818833537.04933
1990	77249487478.26698
1991	79005276292.36066
1992	83335660210.11996
1993	83543393908.19182
1994	88129098081.86107
1995	86270789580.78322
1996	93568117788.20284
1997	94426249014.99432
1998	101521041853.75642
1999	102443592946.38013
2000	99660973137.66046
2001	104522377445.35555
2002	108492159580.19127
2003	110640061408.98405
2004	112357961608.22025
2005	116294684252.0155
2006	123188743105.05963
2007	116697969438.0359
2008	118102972337.8894
2009	125890360160.2944
2010	129490960229.82176
2011	136200700984.01065
2012	137668920236.74756
2013	145577842693.6732
2014	144758492868.69553
2015	144348745874.11615
2016	145551671854.6416
2017	149063807633.71512
2018	154685724009.3033
2019	161094949758.37277
2020	163489542166.2438
2021	164908480686.72684
2022	163583867841.5456
2023	169043301721.2258