Year National currency per current international dollar 1980 1 1981 1 1982 1 1983 1 1984 1 1985 1 1986 1 1987 1 1988 1 1989 1 1990 1 1991 1 1992 1 1993 1 1994 1 1995 1 1996 1 1997 1 1998 1 1999 1 2000 1 2001 1 2002 1 2003 1 2004 1 2005 1 2006 1 2007 1 2008 1 2009 1 2010 1 2011 1 2012 1 2013 1 2014 1 2015 1 2016 1 2017 1 2018 1 2019 1 2020 1 2021 1 2022 1 2023 1 2024 1