Year	including construction (constant 2010 US$)
1991	18885.0616323866
1992	19107.5814331736
1993	19296.8430173087
1994	18528.7225228728
1995	18532.6665603726
1996	18727.7885264241
1997	19613.9348941521
1998	21119.7717587013
1999	22755.9623576636
2000	23823.4566665627
2001	23343.6781957916
2002	23429.8473921953
2003	22489.716577548
2004	22868.4420329632
2005	22475.8792791102
2006	22219.9087808004
2007	22585.5772131412
2008	23062.4530505576
2009	22521.2808654858
2010	22711.4013194119
2011	23252.5805669137
2012	21534.2500931504
2013	20958.5777253583
2014	21419.4095406223
2015	21579.4251552459
2016	24087.2387889225
2017	23755.2240299222