Year including construction (constant 2015 US$) 1991 10305.958839399138 1992 10358.701528524565 1993 9466.227717995054 1994 8939.312023452445 1995 8370.039763568511 1996 8576.949730645612 1997 9392.813994135646 1998 10261.410558028465 1999 10432.291213263588 2000 10604.217916366551 2001 10605.70986114575 2002 10547.290134707284 2003 9836.285160611253 2004 10508.668502843057 2005 10606.83491457796 2006 11018.129925470195 2007 11242.531556983433 2008 11550.350624762914 2009 11431.276119074311 2010 11414.367947355091 2011 11530.20648937808 2012 11264.948098301627 2013 10921.129040325697 2014 10879.828119025617 2015 10808.315768220818 2016 10790.274849778094 2017 10539.661132697363 2018 10335.704615475996 2019 10372.231288165476 2020 9470.86950162971 2021 9107.598054176353 2022 8966.62487423452