Year including construction (constant 2010 US$) 1991 5044.64940310304 1992 5029.03190235207 1993 5164.95582424119 1994 5251.18472894389 1995 5441.28320640443 1996 5459.45170408064 1997 5510.84971816029 1998 5732.55390528336 1999 5532.96565788399 2000 5619.0989347719 2001 6493.55483764786 2002 5727.90028518627 2003 4859.51719962536 2004 5016.58871027081 2005 5291.74291254397 2006 6101.52105120557 2007 5766.29713458396 2008 6246.15056132825 2009 6114.87740896561 2010 6188.21610538713 2011 6273.90862854406 2012 6827.84468527447 2013 7444.70094714137 2014 7136.54538825304 2015 7054.2820314774 2016 7314.96350735123 2017 7411.33586993327 2018 7406.05418876713