Year including construction (constant 2015 US$) 1995 11864.925176545936 1996 13097.780224952445 1997 13229.216921474123 1998 13586.8591546609 1999 14349.88722528507 2000 15490.163275217445 2001 16181.065149151473 2002 17226.99968495793 2003 18249.185350593067 2004 19226.34991198434 2005 20214.25487950548 2006 21568.385940127817 2007 22135.3597267728 2008 22656.779120116862 2009 22644.046291973827 2010 24773.03016822341 2011 26131.405299521535 2012 25624.044869858317 2013 25184.590782879925 2014 26084.757981749986 2015 27287.33967532587 2016 26881.55240593301 2017 27102.329570321697 2018 27963.648272063263 2019 28551.062669833995 2020 27392.352898105717 2021 28440.722402854775 2022 29258.152340424174