Year	including construction (current US$)
1977	9096296.296296295
1978	8666666.666666666
1979	10240740.74074074
1980	12951851.85185185
1981	13985185.185185185
1982	16144444.444444444
1983	16603703.703703703
1984	17155555.555555556
1985	18400000
1986	23737037.037037037
1987	27770370.37037037
1988	39488888.88888889
1989	43051851.85185185
1990	52081481.48148148
1991	49666666.666666664
1992	53377777.777777776
1993	55951851.85185185
1994	57529629.62962963
1995	65192592.59259259
1996	67662962.96296296
1997	72806139.47280614
1998	79179179.17917919
1999	91395098.80250622
2000	113194676.15763913
2001	140184629.07351798
2002	137682126.57101548
2003	114414414.41441442
2004	115081481.48148148
2005	121751851.85185185
2006	149192592.5925926
2007	160151851.85185185
2008	170629629.6296296
2009	179844444.44444442
2010	175559259.25925925
2011	175074074.07407406
2012	154070370.37037036
2013	172392592.59259257
2014	203548148.14814815
2015	217655555.55555555
2016	246814814.8148148
2017	277837037.037037
2018	264299999.99999997
2019	280307407.4074074
2020	204503703.7037037
2021	193855555.55555552
2022	213466666.66666666
2023	212870370.37037036