Year including construction (constant 2010 US$) 1991 6426.92851592032 1992 4633.94325559429 1993 4076.69204926385 1994 4063.86125817823 1995 3509.57734465595 1996 3592.63484150224 1997 2989.62132495457 1998 2943.3602865959 1999 3151.74793245415 2000 3539.2887534177 2001 3022.40147560336 2002 3055.55814338123 2003 3050.76729447547 2004 3059.38027082908 2005 3360.57645901562 2006 3351.65669502175 2007 3342.04618223294 2008 3424.92346636861 2009 3325.40249639467 2010 4223.22059434108 2011 4748.64410938766 2012 4978.31311086392 2013 5159.46723222945 2014 5530.49076482319 2015 5508.72452880777 2016 5296.6841172398 2017 5483.37902465227 2018 5919.75579425011