Year including construction (constant 2010 US$) 1991 8412.30905994943 1992 9376.8409731963 1993 9999.88098167662 1994 10410.8999602932 1995 10892.4519376858 1996 11449.7938772619 1997 12635.4343977327 1998 13167.9674109302 1999 14737.6916061738 2000 15254.2462710635 2001 15527.3845271495 2002 17547.3066429001 2003 16265.9163604068 2004 15642.2358594327 2005 17083.013347737 2006 17973.5625507349 2007 18241.411983267 2008 18880.7558363786 2009 21612.3522280114 2010 22195.6121263591 2011 22236.182108893 2012 21481.9842213143 2013 26275.485652487 2014 26954.0108232678 2015 26322.854050504 2016 27052.5124877779 2017 26309.6656406391 2018 27827.1398452505