Year including construction (constant 2010 US$) 1991 407081.047784962 1992 401579.280578797 1993 419012.331208951 1994 437919.891533363 1995 449003.664053762 1996 450190.38958864 1997 452240.833574744 1998 451349.328204485 1999 375012.703448409 2000 323749.27886652 2001 317460.36972177 2002 304599.033921414 2003 304393.954297606 2004 294648.501456761 2005 285251.416702689 2006 234098.575570644 2007 232292.239262182 2008 193043.56600843 2009 181546.202814418 2010 199361.835065879 2011 203804.710444628 2012 193894.170149373 2013 189573.195045653 2014 182528.469557175 2015 180203.08921196 2016 171984.150059895 2017 155329.281216074