Year including construction (constant 2010 US$) 1991 1608.820484259 1992 1788.34595985862 1993 2012.77787440639 1994 2257.02260319539 1995 2562.21917822982 1996 2823.76315067865 1997 2835.4795823411 1998 2931.72241645781 1999 2932.45457204576 2000 2945.13468017367 2001 2933.61119795339 2002 2881.31275863227 2003 2851.47836965249 2004 2817.64649866549 2005 2801.28943183316 2006 2896.27675927427 2007 2960.60674131171 2008 2975.60357713008 2009 3008.16366752727 2010 2968.05171192306 2011 3108.30749574133 2012 3264.860023766 2013 3435.01028262853 2014 3571.74917485625 2015 3754.72234875963 2016 3989.04919719537 2017 4160.68165308823 2018 4564.43755986548