Year including construction (constant 2010 US$) 1991 13036.0170041794 1992 13237.852094723 1993 13258.3890678843 1994 13096.5898089795 1995 13382.100257118 1996 13777.1113801958 1997 13691.0593579585 1998 13575.3230541191 1999 13188.456765324 2000 13300.659912855 2001 12768.3224094557 2002 12532.7998894957 2003 12770.9532787519 2004 12918.6368535941 2005 12999.0463325249 2006 13167.0014776895 2007 13175.7741904619 2008 13252.7966634369 2009 12733.2693272937 2010 12918.0359573622 2011 13045.1317937933 2012 12819.4778530831 2013 12884.7460542842 2014 12963.9252279821 2015 12484.8922741407 2016 12854.3621252049 2017 12925.8020841534 2018 12356.847455093