Year including construction (constant 2010 US$) 2000 28320.4886309867 2001 28492.5128590447 2002 29631.0409238382 2003 30432.0633960147 2004 31227.0921063785 2005 30599.3356086726 2006 29390.7224216168 2007 29786.1387743329 2008 31926.5345279698 2009 33597.498092744 2010 37779.9615850289 2011 40437.7823697669 2012 40998.0238531944 2013 40852.8444404896 2014 43838.1522807692 2015 45624.2700044079 2016 46935.5326090308 2017 46403.6516929337 2018 46425.2431678924