Year	including construction (constant 2010 US$)
1991	13336.1435882498
1992	14038.7832976302
1993	13208.6986665255
1994	12037.587541524
1995	13188.6605458385
1996	14527.015687551
1997	14211.7621584292
1998	13863.1359887523
1999	12571.321806303
2000	13411.7070130395
2001	12767.5303416409
2002	13394.0275814922
2003	14598.6058925986
2004	14738.3478808789
2005	14950.3164708
2006	15394.1230001135
2007	15223.914246209
2008	15636.2532578875
2009	15894.8463946994
2010	15911.8146127389
2011	15403.1644299273
2012	14899.248706308
2013	15489.9309791997
2014	15542.1337368504
2015	15416.3827567719
2016	16026.6162174253
2017	15977.5628374546
2018	16445.5666125226