Year including construction (constant 2010 US$) 1995 16844.1918276652 1996 17283.4738133878 1997 19220.2549503858 1998 19415.5007279158 1999 19953.2027984033 2000 20898.4145910507 2001 21163.1723972542 2002 22820.4637497706 2003 23884.8125010562 2004 25455.117665268 2005 27067.2982391972 2006 28231.3536220452 2007 29501.3030700699 2008 28494.6560590019 2009 26477.4681958813 2010 28275.9548302342 2011 28195.7324334603 2012 28045.5561299283 2013 27102.9427989913 2014 26793.8157604524 2015 28256.4596995483 2016 27064.4328470788 2017 27040.0971189462 2018 28841.7573458379