Year	including construction (constant 2015 US$)
1960	26572177853.54142
1961	31052767740.939747
1962	34361992213.37333
1963	37201638139.9616
1964	40571067139.14403
1965	47429151522.101845
1966	53172970945.301834
1967	59622479985.21667
1968	69224250272.18227
1969	81985723587.95787
1970	92031883238.39688
1971	105748442786.35161
1972	119609369267.70677
1973	134126025877.88353
1974	135588663955.18721
1975	123211532403.28165
1976	147614571159.36334
1977	134903718561.4307
1978	106730506464.18272
1979	83746569792.99524
1980	44292106740.59746
1981	43489753673.13639
1982	71278897653.74438
1983	76489120900.84476
1984	64647297509.779884
1985	64044629933.05501
1986	59698264750.51157
1987	65015739484.68721
1988	63810811741.799736
1989	66921284542.75613
1990	79493550144.2502
1991	92805485427.02522
1992	93731662753.5498
1993	96014188951.57867
1994	92839794082.05023
1995	92846905685.44583
1996	99041445664.92519
1997	97273313529.92406
1998	96974271666.88455
1999	97537912571.87961
2000	106732468433.26001
2001	106673150411.38371
2002	115575892631.80347
2003	127529560403.71986
2004	131104899597.73645
2005	134922443563.78958
2006	140101351452.50714
2007	147282971728.51477
2008	151472105243.47864
2009	150215766512.3659
2010	159502787260.76505
2011	162434780972.65244
2012	140648407479.89072
2013	132604541549.97244
2014	137844366420.3649
2015	131341443557.08423
2016	153985814166.64404
2017	157544690102.2774
2018	145181528977.20496
2019	129235515345.63747
2020	139315276691.55298
2021	143783944947.58673
2022	154421688490.0881
2023	168076031378.62558