Year including construction (constant 2010 US$) 2006 245972.092883642 2007 256418.126425128 2008 279090.025679319 2009 265423.385825199 2010 216846.554497882 2011 218374.686975336 2012 228784.235541994 2013 198441.658364504 2014 188676.276128749 2015 161348.424998903 2016 140809.373612405 2017 125893.681182255 2018 114133.213712756