Year including construction (constant 2010 US$) 1991 7069.3374049969 1992 6783.76772668076 1993 8171.28450984003 1994 9011.18320284514 1995 9094.70649610069 1996 10130.4030834195 1997 11319.4641503669 1998 11149.7930184101 1999 10471.8141975941 2000 10550.376214354 2001 10723.8935297686 2002 10262.6563406161 2003 10057.9026808167 2004 9923.67802632283 2005 9811.69495095913 2006 9545.23812704459 2007 10243.0028269275 2008 10064.9438067887 2009 9970.96931552857 2010 10163.3988467984 2011 10814.8040805648 2012 11041.973625512 2013 12220.8669631828 2014 12304.3983618397 2015 12087.082650212 2016 14521.5353222414 2017 14292.4815518317