Year including construction (constant 2010 US$) 1991 5652.31154925913 1992 6173.34216084605 1993 5997.18575860451 1994 5328.38673555218 1995 5549.29944554484 1996 5871.23066296349 1997 5863.65689204941 1998 5611.76980814207 1999 5824.8863473515 2000 5728.68862579781 2001 5641.18210534474 2002 5702.54054914344 2003 5973.04862118467 2004 5790.11035846337 2005 5702.54820819247 2006 6312.10802998475 2007 6510.79416580281 2008 6567.83778526071 2009 6109.94529586234 2010 6588.10475204776 2011 6663.72868815995 2012 6579.0925950156 2013 6525.19105815948 2014 5496.71602841077 2015 5561.05901024889 2016 5738.26446888024 2017 6022.72328925101 2018 6187.70667389665