Year	including construction (constant 2010 US$)
1977	17900029459.2248
1978	17560909320.6226
1979	17784191671.7365
1980	17592639488.2563
1981	18895901639.6207
1982	19129761986.2461
1983	19900809916.2335
1984	21306145310.932
1985	20638575835.7391
1986	20846722152.8545
1987	20377141294.5403
1988	19965706518.5526
1989	19963104766.1469
1990	19037609022.794
1991	18193907942.2716
1992	18631217790.1041
1993	19906031002.4007
1994	21218046939.5266
1995	21831403584.2643
1996	22521713894.3976
1997	22798942833.7173
1998	22328664053.2306
1999	23531234538.7683
2000	23725516371.8106
2001	23977352717.7973
2002	25900385178.0014
2003	26771445297.6556
2004	27910255267.8959
2005	28324968606.4241
2006	28388114927.1522
2007	30066395751.2273
2008	28205626653.0169
2009	27909353791.0944
2010	28048747064.3678
2011	27621212450.2336
2012	28243464684.4531
2013	28807404606.0702
2014	30068814772.8228
2015	31162382439.0151
2016	32073673671.9959
2017	32813650951.3479