Year	including construction (constant 2010 US$)
1991	15620.6559322386
1992	16944.2969813148
1993	17368.9722961508
1994	17434.0400865908
1995	17582.7625399081
1996	17199.7908281256
1997	17249.9129585121
1998	17733.5390412528
1999	17892.470021104
2000	18337.6587109227
2001	17985.9963606239
2002	18821.4329468801
2003	19108.9127347506
2004	19982.3796041974
2005	19848.0729107437
2006	20378.5425219964
2007	20278.6676307942
2008	20791.7423807664
2009	20885.7688092203
2010	21859.0479772118
2011	24177.7394656008
2012	24562.707517277
2013	25474.6110791726
2014	23918.9332454967
2015	22182.7926301946
2016	23997.0127064038
2017	23872.1305280124
2018	24454.8635500338