Year including construction (constant 2010 US$) 1991 9234.13864384257 1992 9312.06116147207 1993 9090.66260817478 1994 9203.84782011852 1995 9270.50426138715 1996 9298.91046356599 1997 9567.32430276626 1998 9689.89050773404 1999 9739.61499765402 2000 9807.48136799263 2001 9796.2382890762 2002 9830.96717691531 2003 9938.37456570825 2004 10310.6745816023 2005 10649.7441485748 2006 10410.1039822506 2007 10718.7578180902 2008 10935.8646928325 2009 9887.48956498684 2010 10609.9276410332 2011 10900.6845645988 2012 11194.1480882602 2013 11157.1530218899 2014 11599.3114746352 2015 11783.7742946945 2016 11913.0357844465 2017 12274.4209872026 2018 12471.2837625483