Year	including construction (constant 2010 US$)
1991	7375.58471537703
1992	6943.86378664224
1993	6916.1676732307
1994	6927.20245610256
1995	7525.25358984255
1996	7653.48365716414
1997	8081.04520133851
1998	8328.27452182357
1999	8743.33428578841
2000	9339.15732815451
2001	9785.46609279794
2002	10378.3601559987
2003	11075.1313958705
2004	11673.9002860264
2005	12167.6834667396
2006	12874.4393563501
2007	13898.3889945833
2008	14620.9822166644
2009	15106.4953366951
2010	17338.7953592814
2011	18197.156520041
2012	18951.5635230398
2013	19591.5217892606
2014	20082.6642612918
2015	21041.7448813938
2016	21923.7065024238
2017	22647.9585057741
2018	23423.4486119631