Year including construction (constant 2015 US$) 1991 1950.7299557473757 1992 2157.139176620632 1993 2411.258120560874 1994 2682.822939842409 1995 3011.502260663523 1996 3279.803141914792 1997 3347.216855541913 1998 3513.589570953864 1999 3537.1251070226026 2000 3587.925765296237 2001 3421.5694384227595 2002 3194.38548622496 2003 2996.1192734886677 2004 3047.7757967621437 2005 3119.610676216948 2006 3346.2813585154026 2007 3447.877497493186 2008 3496.444119805584 2009 3547.8565024539926 2010 3499.228180200431 2011 3575.339964880539 2012 3646.0990645498764 2013 3716.5394129858487 2014 3988.8581164753214 2015 4313.1830834988305 2016 4705.748813348352 2017 4802.127643140498 2018 5083.559835524351 2019 5427.070821270944 2020 5579.986974619894 2021 5853.704583255635 2022 6286.762790911193