| Date of accession | Head of State | Country |
| June 9, 1946 | |
| February 6, 1952 | |
| October 5, 1967 | |
| September 1, 1969 | |
| July 23, 1970 | |
| January 14, 1972 | |
| September 15, 1973 | |
| November 22, 1975 | |
| July 18, 1978 | |
| August 3, 1979 | |
| | Date of accession | Head of State | Country |
| September 10, 1979 | |
| April 18, 1980 | |
| April 30, 1980 | |
| October 7, 1981 | |
| November 6, 1982 | |
| August 26, 1984 | |
| January 26, 1986 | |
| April 25, 1986 | |
| October 15, 1987 | |
| November 7, 1987 | |
|