Year	including construction (current US$)
1987	1000000000
1988	1000000000
1989	1000000000
1990	900000000
1991	900000000
1992	390000000
1993	1901587301.5873015
1994	1148311306.9016151
1995	1466887480.250509
1996	1551289134.4383059
1997	1103341497.4928567
1998	1057170625.6260544
1999	1069670313.2885214
2000	1192674887.3699143
2001	1483614360.2654488
2002	1798126717.0896997
2003	2324364573.06152
2004	2589810097.2672534
2005	3003629764.0653353
2006	3678039260.969977
2007	4775609756.097561
2008	11668095052.590572
2009	12312631578.947369
2010	13353684210.526316
2011	19255789473.68421
2012	23412280701.754387
2013	24862105263.157894
2014	26405964912.2807
2015	19436857142.857143
2016	18602857142.857143
2017	17842000000
2018	18306285714.285713
2019	19184285714.285713
2020	17128000000
2021	18564857142.857143
2022	22944285714.285713