Year including construction (constant 2010 US$) 1991 1746.83803139873 1992 1783.7923096941 1993 1704.3039764315 1994 1862.92485319895 1995 1849.36294269685 1996 1916.32536013939 1997 1856.0404318945 1998 1864.56685734855 1999 1874.08472805911 2000 1837.82232448694 2001 1702.62937866227 2002 1568.9751439085 2003 1635.73901482037 2004 1684.93328906461 2005 1762.34898349304 2006 1808.90014912291 2007 1876.83603133628 2008 1985.29611371047 2009 2257.15480251773 2010 2327.18477856389 2011 2276.29383527434 2012 2285.42821785386 2013 2185.85889582606 2014 2192.43244734038 2015 2188.87254647529 2016 2173.71306795266 2017 2132.14279352123