Year including construction (constant 2015 US$) 1995 4960.906149224633 1996 4783.197848182275 1997 5676.721747120139 1998 6632.985436871274 1999 7260.362667955151 2000 6768.968828058119 2001 7003.698328380353 2002 6750.148344028049 2003 7180.875436928802 2004 9518.763503364164 2005 11752.275441983831 2006 13502.362395649709 2007 16197.419884525034 2008 18004.52397158855 2009 13598.510902371761 2010 12634.372634401483 2011 12635.165194498195 2012 11496.90084856921 2013 9388.608991889223 2014 9633.653311235932 2015 10491.476808938643 2016 10466.847467136793 2017 10905.770635325704 2018 11682.304395488818 2019 11155.382228893523 2020 7705.336896278791 2021 6860.555510848776 2022 8299.20264592122