Year including construction (constant 2015 US$) 1998 383614.3498621526 1999 352480.742282556 2000 341179.9405444651 2001 314051.5911352972 2002 268584.5597833273 2003 223186.32497859886 2004 190305.93717551278 2005 166448.7079321657 2006 145139.79552953964 2007 123491.2876155485 2008 116233.23354541267 2009 101334.64644520238 2010 79981.25459184164 2011 68024.83269350877 2012 60399.2260825491 2013 55239.893546909865 2014 51220.69541964924 2015 51275.70934465917 2016 46383.24306255686 2017 41134.42133834668 2018 38464.16124018569 2019 38242.2681056871 2020 41797.21617392867 2021 42362.57441346611 2022 43204.88631456449