Year including construction (constant 2015 US$) 1980 36573438.18740836 1981 40949157.43028198 1982 40492190.11835971 1983 48709944.90917276 1984 48117283.50053683 1985 55679623.74748947 1986 56818335.55023435 1987 63318891.19936219 1988 65354851.92660438 1989 72190122.11205843 1990 72982797.67222004 1991 75125538.69171555 1992 86790797.07387266 1993 89975937.58312944 1994 106985061.6528371 1995 115020904.31647034 1996 131696755.0681892 1997 133137577.12453064 1998 148545083.3597842 1999 151871040.91661322 2000 164105494.90150967 2001 149571399.07882518 2002 158600484.29102886 2003 160486106.7831352 2004 172153545.55958527 2005 191387481.78384706 2006 206393773.33321232 2007 234960844.56581846 2008 279006830.70140857 2009 262510592.3192527 2010 254082952.82417607 2011 256232921.2089619 2012 244351126.63196775 2013 253342893.5959334 2014 265286806.7712039 2015 255757282.33079502 2016 222507949.68539435 2017 233382872.99176073 2018 241473733.56984553 2019 250934333.81095067 2020 206210552.4433456 2021 206981330.29392037 2022 223497780.19317645 2023 226133059.59264618