Year including construction (constant 2010 US$) 1965 139516376.498473 1966 157091980.080913 1967 177755690.192908 1968 195171524.366226 1969 175862625.635166 1970 192899883.795183 1971 192899883.795183 1972 207476259.500314 1973 227163780.367484 1974 217509307.94055 1975 207097637.364204 1976 213533936.941224 1977 237386162.937179 1978 237196828.80772 1979 275057474.243237 1980 278843557.235912 1981 296448725.538689 1982 279032845.242563 1983 258588126.225981 1984 264077893.52413 1985 245904768.955783 1986 274300229.971017 1987 233032169.801743 1988 217887930.07666 1989 280392038.290319 1990 288943760.485525 1991 284356708.79804 1992 313286318.060112 1993 330641224.003219 1994 343657449.583358 1995 349567072.808539 1996 375454375.490033 1997 386846524.732407 1998 391512400.299854 1999 423083047.707351 2000 400056466.108826 2001 429142708.429034 2002 438838137.910038 2003 442534465.917102 2004 486890955.475593 2005 454593135.867105 2006 457608414.481822 2007 434034447.390379 2008 495172259.643753 2009 500336630.526958 2010 533025387.061461 2011 543602407.906777 2012 531423034.566568 2013 554926249.269556 2014 561469184.780146 2015 600170926.460457 2016 645745141.843123 2017 674161034.799941 2018 707869086.539935