Year including construction (constant 2010 US$) 1991 10193.067662943 1992 10460.9777185387 1993 10471.6163037231 1994 10307.9398356566 1995 10668.7814823428 1996 10725.2208646062 1997 10828.9935197689 1998 11142.8907953821 1999 11016.7803976129 2000 12302.2421870436 2001 13052.2306681644 2002 13859.1074467796 2003 14226.9221809351 2004 13815.4579488459 2005 12944.2573758455 2006 13351.8490173283 2007 13303.385737015 2008 13428.8006964815 2009 13121.1747150636 2010 12319.7295297492 2011 13568.4973820175 2012 12670.1788638215 2013 12878.898124198 2014 12736.3096218066 2015 12773.3031802534 2016 12420.7839450088 2017 11889.9201167652 2018 12335.3391386705