Year	including construction (constant 2010 US$)
1968	5571928997.15467
1969	5778472145.96421
1970	5818202101.93671
1971	6351530716.88795
1972	5600871349.16873
1973	7656567682.72042
1974	8201473238.38227
1975	10001161312.2281
1976	12403113421.3891
1977	12055805196.5551
1978	14731920313.4777
1979	19255609941.258
1980	22262194096.1808
1981	18793321645.0249
1982	19654225062.87
1983	18117649280.4499
1984	16683687291.7761
1985	16728942605.964
1986	17350150726.1821
1987	23035744233.2288
1988	21400501341.5835
1989	19610022197.9067
1990	50481776696.6282
1991	10339523719.0804
1992	14541427014.3696
1993	14127288267.6209
1994	15870670311.0379
1995	18204476336.6821
1996	19742104568.2318
1997	39313712371.578
1998	61324634229.4211
1999	73246252157.2969
2000	74882021273.6021
2001	76124437514.0382
2002	66951027470.8377
2003	41130502744.3499
2004	57747885738.681
2005	56143163872.8391
2006	59415228329.9192
2007	63657650918.1231
2008	71509921277.0968
2009	73557332177.9346
2010	77283320940.1709
2011	82878777360.8164
2012	95847659784.502
2013	100433486771.483
2014	104595220168.061
2015	112295581053.153
2016	135058773495.919
2017	130820123163.97
2018	129336995944.546