Year constant 2011 international $ 1990 10174.6248238531 1991 10775.0151340954 1992 11402.1774262959 1993 12272.6059458304 1994 13072.8674403903 1995 13997.1021685272 1996 15002.5417197769 1997 15591.1633945121 1998 14052.775366346 1999 14329.5838328509 2000 15070.7138714002 2001 14973.2182267767 2002 15558.834048963 2003 16295.6077520701 2004 17078.425302436 2005 17756.8555362198 2006 18661.329934253 2007 19605.9177169668 2008 19949.8831984206 2009 19514.9159411034 2010 20373.845570768 2011 21290.1941536854 2012 21836.1070393019 2013 22640.8693435636 2014 23686.1895586388 2015 24702.6752364039 2016 25394.1921620216 2017 26555.2584635178 2018 27226.6756052377