Year including construction (constant 2015 US$) 1991 2336.014768828511 1992 2341.749444807672 1993 2141.605693745123 1994 2274.504104421996 1995 2348.295231148015 1996 2468.5546606438315 1997 2393.7581064951564 1998 2384.5523665933815 1999 2411.135189879936 2000 2348.3984210073813 2001 2109.727406555878 2002 1926.6244161821837 2003 2071.565767038262 2004 2124.68388309882 2005 2229.2222028025712 2006 2395.5947930423895 2007 2646.298779288378 2008 2825.6188171030817 2009 3287.8116076607325 2010 3492.2413450290687 2011 3493.019209364275 2012 3424.8817526163252 2013 3444.714225374235 2014 3507.930304617537 2015 3552.1087387597645 2016 3567.0526068699933 2017 3560.6454795751815 2018 3640.487440509834 2019 3722.8281252801376 2020 3589.0257005720623 2021 3450.1280521883646 2022 3283.0101558432793