Year	including construction (constant 2010 US$)
1991	6314.84914641017
1992	6942.76338677252
1993	6201.78326039706
1994	5186.94788860155
1995	4873.13768077755
1996	5764.0366904752
1997	5690.2115354649
1998	5451.12404446449
1999	5681.62471660517
2000	5255.23718076674
2001	4826.84130973203
2002	4428.70605835272
2003	3946.3666165839
2004	3753.62900206272
2005	3449.25848380228
2006	3496.18410551208
2007	3559.74772698975
2008	3627.96947969429
2009	3726.87534587336
2010	3663.61022857182
2011	3618.65973007277
2012	3633.43716019906
2013	3546.44885889028
2014	3627.89804468576
2015	3195.76401428088
2016	2967.85111458712
2017	3431.27178198154
2018	3478.05635435625