Year current international $ 1990 16613.813520939533 1991 17208.80510975802 1992 17804.688837624086 1993 18273.570459757455 1994 19091.26238907845 1995 19832.568050799702 1996 20760.698025869395 1997 21768.797176691573 1998 22408.15448569503 1999 23264.844327716502 2000 24771.068995213085 2001 25550.033425951027 2002 26286.521700766465 2003 27049.99168985769 2004 28525.25710412273 2005 29908.08334885834 2006 31988.202595052993 2007 33351.43137074091 2008 34046.24503233484 2009 33190.32831422014 2010 34650.081880350735 2011 36181.590101056616 2012 37263.55506654703 2013 38509.56852735865 2014 39726.92359570426 2015 40780.29947251424 2016 42052.65998461392 2017 43725.33210679208 2018 45413.900057072075 2019 47444.55509725779 2020 46344.49632151821 2021 51145.19828940042 2022 56192.831462764676 2023 59083.274788742856