Year including construction (constant 2010 US$) 1991 59235.3380192618 1992 60929.5508241072 1993 60787.8066682971 1994 64872.7407246195 1995 68454.1689272308 1996 69135.9030998871 1997 70609.8527019678 1998 70669.3318498419 1999 71056.195837062 2000 73878.7629258711 2001 73024.4625822821 2002 72720.8776708857 2003 70719.7209885884 2004 71978.9319904796 2005 73387.9987570583 2006 76690.6895843659 2007 77397.7130784783 2008 75800.388292988 2009 67784.1106553634 2010 72743.0343300141 2011 73362.4992920485 2012 72887.9301913647 2013 73140.8569439019 2014 71921.1544262375 2015 72769.2681655926 2016 74528.8159052676 2017 76254.1702920797 2018 77675.2169760872