Year constant 2010 US$ 1970 10533.2145793561 1971 10968.3327721704 1972 11785.5317259126 1973 12716.2788558368 1974 12465.0291684048 1975 12806.4224048949 1976 13081.4505980361 1977 13479.6473086543 1978 14059.6398874631 1979 14846.4314909844 1980 14887.7407843303 1981 15144.8135672603 1982 15742.2985672005 1983 16163.6224305368 1984 16565.1178606473 1985 17140.372037654 1986 17663.5403819926 1987 18346.5278467436 1988 19209.7975985987 1989 20073.7854234924 1990 20963.6722111055 1991 21362.8041499571 1992 21794.2116806071 1993 21975.4105467077 1994 22404.3073330865 1995 22876.0457235581 1996 23294.1994648538 1997 23399.7895656357 1998 23199.2732759796 1999 23425.5600567866 2000 23755.0084197433 2001 24147.7264231194 2002 24376.4106995451 2003 24484.5482926017 2004 24797.1424367867 2005 25101.1034607057 2006 25344.68006178 2007 25552.4618094762 2008 25280.6596758 2009 25105.3439532125 2010 25703.3630413186 2011 25651.5128340166 2012 26213.8048303164 2013 26873.4477204301 2014 26678.4804631863 2015 26643.9102862507 2016 26642.2164490408 2017 26988.8495660345