Year	including construction (constant 2010 US$)
1977	14303107.2564317
1978	16482173.03646
1979	14605250.5709544
1980	18998851.4173327
1981	19722276.0719739
1982	20476791.637991
1983	20708091.3979971
1984	22626115.9902751
1985	23603190.4027613
1986	23438551.1373643
1987	25405064.0075351
1988	29150428.9478015
1989	30964369.1005441
1990	33560255.6475245
1991	34369828.5620773
1992	36671303.3290047
1993	37026226.1964166
1994	37256532.0366537
1995	39840836.5527
1996	41116492.6081849
1997	42353764.3569636
1998	45436197.6312569
1999	43470227.3447535
2000	52942667.3398756
2001	51875749.5181092
2002	43118358.6314115
2003	46464957.3799519
2004	48716585.3360093
2005	50711513.5277685
2006	52289342.3081486
2007	56588309.2480296
2008	61149330.1482328
2009	56198772.6344917
2010	57814704.8148148
2011	57760481.2880459
2012	56311208.413245
2013	55181942.1853603
2014	56306172.1508893
2015	52343918.9102103
2016	56088133.4524437
2017	48579984.7131987
2018	54782968.2357463