Year including construction (constant 2015 US$) 1991 11503.125654470665 1992 11260.797654279122 1993 10650.975009731043 1994 10301.725483795584 1995 9798.183946084011 1996 9896.369044256178 1997 9865.342232548117 1998 9686.283100506742 1999 9367.604019092654 2000 9512.23589806524 2001 9414.273122434752 2002 9809.879822459718 2003 10011.089928113925 2004 10073.128524976652 2005 10342.400454183518 2006 10433.171967580185 2007 10634.755015081728 2008 10965.460189599999 2009 10688.840990191859 2010 10965.595453003589 2011 11109.725965926082 2012 10801.688573315487 2013 10598.10802475454 2014 10579.440917677053 2015 10216.503473553706 2016 9884.447177786202 2017 9814.169850705928 2018 9768.567171072802 2019 9748.520232913239 2020 9123.209073545753 2021 9049.66437501559 2022 8660.720585837302