Year	including construction (constant 2010 US$)
1968	60728924363.4375
1969	63776460827.9578
1970	104266034538.991
1971	128427685889.996
1972	160819571605.618
1973	202168069594.997
1974	229952741153.284
1975	195717879529.342
1976	239072114293.544
1977	254806625193.881
1978	234230548055.389
1979	267576726290.617
1980	281010848114.128
1981	281158345905.228
1982	199468693249.777
1983	149662768099.06
1984	137993623365.885
1985	114344745161.743
1986	154154489576.951
1987	138226398379.134
1988	164563610922.176
1989	162114009039.935
1990	198919583415.446
1991	241509248888.648
1992	248597854946.423
1993	242330942079.015
1994	244618036321.564
1995	246407242385.77
1996	253276889864.872
1997	251586629723.973
1998	259141546715.348
1999	241935421719.271
2000	258887973956.86
2001	251369761066.496
2002	237081954780.971
2003	274103044959.851
2004	295348991015.134
2005	309611261926.042
2006	311013074008.49
2007	307252399242.41
2008	323253935468.936
2009	300756622483.992
2010	308389509866.667
2011	345266330976.296
2012	362303407395.602
2013	363109274523.577
2014	374456672859.239
2015	393343915697.648
2016	402577151996.42
2017	392927424925.9
2018	402823163923.913