| Former (15) |
| Unofficial title | 1971 – 1990 |
| Management | 1971 – 1990 |
| Unofficial title | 1995 – 1997 |
| Unofficial title | 1971 – 1995 |
| Unofficial title | 1971 – 1995 |
| Unofficial title | 1997 – 1998 |
| Deputy | 1971 – 1988 |
| Unofficial title | 1995 – 1997 |
| Unofficial title | 1997 – 1999 |
| Management | 1971 – 1996 |
| Unofficial title | 1971 – 1988 |
| Unofficial title | 1971 – 1995 |
| Unofficial title | 1998 – 1998 |
| Unofficial title | 1971 – 1991 |
| Management | 1997 – 1999 |