Year	including construction (constant 2010 US$)
1991	4090.77884069997
1992	3924.51637630488
1993	3868.97903404365
1994	3725.06624163354
1995	3762.63928393753
1996	3850.32292278199
1997	3831.00787527399
1998	3831.60056357036
1999	3876.28830663148
2000	3604.23192393325
2001	3582.09812900596
2002	3598.50194344633
2003	3658.11519200615
2004	3689.7704039143
2005	3720.04383697757
2006	3706.08225400326
2007	3844.29838162969
2008	4095.06560388064
2009	4130.11410507175
2010	4275.50278504261
2011	4308.08680446211
2012	4204.30382723456
2013	4422.76309049704
2014	4516.59981390932
2015	4487.9301694994
2016	4602.56880216232
2017	4793.02685069296
2018	4873.96016207186