Year	constant 2015 US$
1968	4536786431.525407
1969	4248188274.626275
1970	4594581583.263861
1971	4585004085.583638
1972	4871896051.946073
1973	4562292788.779297
1974	4736696957.635643
1975	5081386288.230871
1976	5572234112.286707
1977	5434595184.454092
1978	5193931296.145848
1979	5582461847.192636
1980	5795503603.907486
1981	6062994632.663228
1982	6555455887.204584
1983	6189709575.5480175
1984	6380077479.020103
1985	6608278593.337549
1986	6828247972.499521
1987	7254706864.5598135
1988	7179864516.189033
1989	7488259028.018199
1990	7466196184.392713
1991	7661155289.787067
1992	7833660977.892777
1993	7872609408.864063
1994	7872157444.457858
1995	8321085550.423016
1996	8593694860.569107
1997	8844540966.755003
1998	9396738713.856644
1999	9929797309.871655
2000	10310695273.355616
2001	10780801409.328253
2002	10764606501.669958
2003	11405090720.667988
2004	11958599973.395424
2005	12481877082.131342
2006	12805694595.851503
2007	13169201248.49125
2008	13690355371.186405
2009	13959295430.644323
2010	14449797191.42477
2011	14551692960.13754
2012	15121028201.0283
2013	15477307221.375269
2014	16390664957.6336
2015	17312461398.556427
2016	18398871443.66879
2017	19723737936.91809
2018	20998963088.50944
2019	21964461282.035152
2020	22477255713.4904
2021	23726736022.604565
2022	24473759665.752785
2023	25284980295.514233