Year constant 2021 international $ 1990 17441.72349372253 1991 15588.329491829623 1992 14851.177383506994 1993 14896.70831608877 1994 15442.38277940719 1995 16315.955013608775 1996 17092.740873968924 1997 17407.13183970331 1998 17872.380349593575 1999 18203.03757928593 2000 19024.605760761355 2001 19766.06584511 2002 20631.295267348498 2003 21525.620473376286 2004 22889.559128294324 2005 24096.127371489067 2006 25756.74176904561 2007 27512.23719589822 2008 28781.135396852635 2009 27850.27623956846 2010 28278.635496093477 2011 29362.669265779503 2012 29693.419386832127 2013 29950.50921132723 2014 30988.651443785344 2015 32298.524611907633 2016 33277.663117265154 2017 35104.42754343368 2018 36932.30408799174 2019 38440.99079725381 2020 37210.626935755 2021 39902.215831765556 2022 42164.25707386399 2023 42391.25013152295