Year including construction (constant 2015 US$) 1991 6498.840742967103 1992 6198.8544421784245 1993 6440.60595452716 1994 6603.716393723582 1995 7110.379981341899 1996 7519.96719515689 1997 7840.626214791841 1998 8218.63759116081 1999 8677.263758609455 2000 9461.454686804502 2001 10319.42955318461 2002 11153.192124362671 2003 11952.911885872449 2004 12536.072237073136 2005 12856.76473170372 2006 13403.180282159969 2007 14011.184185072061 2008 14708.914110661388 2009 15185.261987042975 2010 16455.312820084837 2011 17415.17574036669 2012 17977.224871492075 2013 19006.88786347508 2014 19959.309768556377 2015 21394.2067462343 2016 21970.606260532964 2017 22684.59867999576 2018 23498.91180238566 2019 24078.89317293723 2020 24584.145041925003 2021 25427.442615117936 2022 26324.300110866137