Year including construction (constant 2010 US$) 1991 3617.46601207447 1992 3990.26997543722 1993 4307.01946551149 1994 4648.78562603485 1995 5010.64221051171 1996 5347.62006459041 1997 5679.25407649741 1998 5852.02404475419 1999 6217.01823574085 2000 6624.51048703547 2001 7028.85897972513 2002 7627.27794673794 2003 8317.49263262281 2004 8749.17907586507 2005 9294.74955061855 2006 10005.8143077691 2007 10979.0319103717 2008 11753.4959011024 2009 12530.5810061895 2010 13685.8007696508 2011 14518.1978746983 2012 15393.9401348464 2013 16159.4609661253 2014 16841.4062962662 2015 17734.9722538285 2016 18669.8501644063 2017 19632.2603768276 2018 20891.8458415157