Year	including construction (constant 2015 US$)
1970	7181958059.365819
1971	7799375240.265703
1972	8175118035.85309
1973	8453785452.048021
1974	8535450516.680755
1975	9352389639.901297
1976	9862486394.969755
1977	10709514999.78349
1978	11403794623.522657
1979	11529599463.616392
1980	11037515370.331757
1981	13173405782.924887
1982	14234626908.754057
1983	14992961788.626015
1984	16282794426.497046
1985	17136592100.914776
1986	16366018400.9888
1987	15431969162.39317
1988	16589258924.249811
1989	17396579531.579494
1990	17735192864.863678
1991	14466753703.960032
1992	10560109804.85676
1993	8509846047.634807
1994	8934281289.720747
1995	9776400661.260227
1996	11122129423.447275
1997	11714934551.035143
1998	10972588468.945591
1999	11751943006.740488
2000	12660575950.890703
2001	12440367266.490126
2002	12495796220.510347
2003	12500485074.626862
2004	12915616123.01396
2005	13918892797.748585
2006	15785864678.62301
2007	16335465364.708712
2008	16999440599.422241
2009	17115992116.032736
2010	16891596954.742414
2011	17035611759.749636
2012	17804248916.706787
2013	18437244222.436207
2014	17903049771.304768
2015	19477500000
2016	19110262247.231583
2017	19530594299.857872
2018	20023416586.42272
2019	19296309280.21184
2020	17723031265.04574
2021	16526033792.729898
2022	15413770612.662495