Year constant 2021 international $ 1990 28027.127394506027 1991 24831.332513916168 1992 24680.30495857708 1993 24669.926129765772 1994 25378.481806247473 1995 27044.866808982602 1996 28231.27987824616 1997 28115.22981633484 1998 28041.53559976768 1999 28458.735346932615 2000 29680.489193454843 2001 30698.784496578122 2002 31240.91714723123 2003 32369.75737959875 2004 33917.79758405979 2005 36106.94101551475 2006 38446.02216945498 2007 40351.43983529384 2008 41093.196220676065 2009 38956.76837922982 2010 39789.22796010547 2011 40406.03650951657 2012 40032.79203033412 2013 40001.14494917086 2014 40862.96980865888 2015 42980.244810745484 2016 43986.2199023629 2017 46137.02379248391 2018 47463.679390893194 2019 48709.58021779691 2020 45917.2904317005 2021 48418.11578718684 2022 48783.99277745401 2023 47730.524254223375