Year LCU per US$, period average 1960 4.5000000035 1961 4.5000000035 1962 4.5000000035 1963 4.5000000035 1964 4.5000000035 1965 4.5000000035 1966 4.5000000035 1967 4.5000000035 1968 4.5000000035 1969 4.5000000035 1970 4.5000000035 1971 4.48682941297145 1972 4.14475320586966 1973 3.70658904010294 1974 3.549999999 1975 3.517612499 1976 3.529999999 1977 3.525064999 1978 3.39956166566667 1979 3.36083666566667 1980 3.32674166566667 1981 3.38250833258333 1982 3.42817083241667 1983 3.45475916575 1984 3.523810833 1985 3.62213583316667 1986 3.70625 1987 3.75 1988 3.75 1989 3.75 1990 3.75 1991 3.75 1992 3.75 1993 3.75 1994 3.75 1995 3.75 1996 3.75 1997 3.75 1998 3.75 1999 3.75 2000 3.75 2001 3.75 2002 3.75 2003 3.75 2004 3.75 2005 3.75 2006 3.75 2007 3.75 2008 3.75 2009 3.75 2010 3.75 2011 3.75 2012 3.75 2013 3.75 2014 3.75 2015 3.75 2016 3.75 2017 3.75 2018 3.75 2019 3.75 2020 3.75 2021 3.75 2022 3.75 2023 3.75