Year including construction (constant 2010 US$) 1991 106356.783006812 1992 111197.953063224 1993 114842.710624951 1994 119594.233232937 1995 113733.674913303 1996 118905.944529786 1997 125016.753656433 1998 125318.949866107 1999 127203.145141851 2000 126535.949884777 2001 132295.637004268 2002 139681.90679715 2003 145437.173496779 2004 147762.446898188 2005 151046.854127299 2006 154226.886165028 2007 157455.026474629 2008 155940.662119064 2009 147623.252008673 2010 157178.355806255 2011 163535.094172512 2012 166528.768385769 2013 164708.509646116 2014 166276.256094424 2015 168485.79165445 2016 169127.052703443 2017 174268.854661772 2018 183657.613163002