Year current international $ 1990 16721.482740018142 1991 17330.584562826258 1992 17943.2457432709 1993 18418.700461556447 1994 19231.339087565233 1995 20003.206806471117 1996 20884.73628576832 1997 21831.445369950285 1998 22417.549342341652 1999 23284.03721563668 2000 24716.300669700635 2001 25485.48562073536 2002 26265.69442345446 2003 27043.072051983418 2004 28473.381096324913 2005 29808.2946830132 2006 31790.785173661097 2007 33347.17905338533 2008 34222.224345248644 2009 33280.66777215145 2010 34549.57211685868 2011 35994.515698288196 2012 36979.752633235265 2013 38307.74045282744 2014 39438.06392877341 2015 40574.160993973586 2016 41954.22472122926 2017 43574.8448263325 2018 45250.34083889693 2019 47241.42202734362 2020 46290.713376258354 2021 50844.756435533345 2022 55935.146988120134 2023 58955.50536572938