Year including construction (constant 2010 US$) 1997 73030.4685334991 1998 74865.9924404634 1999 78254.4457383529 2000 80782.3267318137 2001 80255.0416631546 2002 84400.2609888965 2003 87835.7781168139 2004 91997.9680287613 2005 92285.8415738959 2006 94468.8268055068 2007 99318.121121901 2008 98891.3301731699 2009 101106.017013883 2010 106174.433113752 2011 105900.143396036 2012 105714.417992812 2013 106085.619543943 2014 106445.456086822 2015 107155.393579707 2016 106054.842622068 2017 106939.949191692