Year including construction (constant 2015 US$) 1991 4648.585228734297 1992 4462.4321647630895 1993 4354.43763343527 1994 4233.353886350103 1995 4402.793486716088 1996 4783.35139079712 1997 4859.526920170702 1998 4694.876001581668 1999 4951.297356944121 2000 4780.983659837753 2001 4612.556931128664 2002 4550.200778149834 2003 4525.155247838313 2004 4717.5497706215265 2005 4848.56686523794 2006 5010.125774837578 2007 5127.972877786972 2008 5462.631606257998 2009 5516.496869311036 2010 5711.789937897117 2011 5769.245309835369 2012 5428.83196652797 2013 5451.9842628313245 2014 5625.824010648464 2015 5561.327992245531 2016 5771.776773118459 2017 6059.8053633116415 2018 6280.807485964225 2019 6408.622409795871 2020 6256.784191908438 2021 6376.924405540754 2022 6585.320967860267