Year constant 2021 international $ 1990 11270.76016073283 1991 11184.801899426164 1992 11145.910195650113 1993 11133.56362117404 1994 11254.176575908128 1995 11427.054774604716 1996 11673.709530620368 1997 11957.052884152712 1998 12084.980771214872 1999 12344.77211905059 2000 12763.213441957618 2001 12896.537403326623 2002 13075.226152892516 2003 13383.18893480171 2004 13891.6804844092 2005 14342.010151673225 2006 14896.102995096293 2007 15476.872472066752 2008 15710.449322958686 2009 15403.947443684016 2010 15992.79156350312 2011 16419.5709181855 2012 16726.666025768427 2013 17058.175596994963 2014 17427.03429587202 2015 17793.43509991147 2016 18158.772343724566 2017 18636.360207622136 2018 19103.66209677874 2019 19450.63230917955 2020 18699.44371083005 2021 19724.12920714383 2022 20214.794483946083 2023 20660.927840544064