Year including construction (constant 2010 US$) 1991 11417.1612700343 1992 11660.8354085664 1993 11950.6629956615 1994 12196.8003071103 1995 12174.0516832887 1996 13452.0377758846 1997 13410.2088509055 1998 13498.0732911039 1999 12448.3211562019 2000 12035.2319951921 2001 11640.5803853457 2002 11541.1456363221 2003 11286.2422997273 2004 11598.915061111 2005 11751.2019306701 2006 11522.7036448811 2007 13287.9130362754 2008 14142.3360585352 2009 14437.346140253 2010 15032.8779052671 2011 14652.8571603997 2012 13804.0365382687 2013 13521.8813732887 2014 12311.4442600683 2015 11169.764106932 2016 11153.2950956594 2017 10458.8007211146 2018 11666.7437116359