Year	including construction (current US$)
1970	964146100
1971	1171202400
1972	1377926862.5393496
1973	1691435102.5331726
1974	1931205365.8536587
1975	2206259756.097561
1976	2337286114.494519
1977	2406211927.7108436
1978	3019556233.766234
1979	3312409589.0410957
1980	3376296805.555556
1981	3429644819.2771087
1982	3536654941.1764708
1983	3739036786.961583
1984	4056486738.7592487
1985	3934218364.4502673
1986	4202212023.038157
1987	4077017804.9090676
1988	4569085751.978891
1989	4608101627.579136
1990	4972161569.148936
1991	4138048996.860925
1992	3713363648.6486487
1993	3644444189.1891894
1994	4811917567.567568
1995	5465476445.806205
1996	6676000000
1997	6995700000
1998	6670600000
1999	7202700000
2000	7804900000
2001	7877000000
2002	7961400000
2003	8079900000
2004	8419800000
2005	9179866100
2006	10843888888.888887
2007	12223796296.296295
2008	12604074074.074074
2009	12993518518.518518
2010	13636111111.11111
2011	15356000000
2012	17091000000
2013	17860000000
2014	17867000000
2015	19477500000
2016	20962931053.7
2017	23589549691.7406
2018	24890354394.8232
2019	25391000000
2020	24710100000