Year constant 2010 US$ 1970 10262.7479727549 1971 10611.0724192909 1972 11141.4474700763 1973 11662.2854987716 1974 11622.8589051304 1975 11792.2008464014 1976 12234.8269586181 1977 12544.7490614485 1978 12933.6079729376 1979 13287.329674131 1980 13307.846260989 1981 13370.3508498578 1982 13483.2505980253 1983 13825.4189143225 1984 14175.5311141106 1985 14615.294273858 1986 15113.1131243026 1987 15582.7075139351 1988 16140.8485810701 1989 16606.3170852364 1990 16952.9347781094 1991 17033.9500237932 1992 17403.0967060113 1993 17580.3446690635 1994 17981.5307462289 1995 18289.5225017623 1996 18710.5748890586 1997 19127.148319283 1998 19602.2257575296 1999 20256.9474050732 2000 20912.8156887103 2001 21269.2634376307 2002 21590.2887227385 2003 21912.0281493112 2004 22397.1906449879 2005 22868.3557608344 2006 23302.693910382 2007 23692.2976891103 2008 23588.5991100598 2009 23138.765663675 2010 23376.4240894659 2011 23521.772644369 2012 23615.8129533231 2013 23766.5286351555 2014 24066.3386471458 2015 24502.4134427399 2016 24897.4505803042 2017 25321.8540892744