| 1969 | 1969 |
 |
 |
| Stylised Owl | Stylised Owl |
| 1981 | 1982 |
 |
 |
| Stylised Owl | Stylised Owl |
| 1988 | 1990 |
 |
 |
| Stylised Owl | Stylised Owl |
| 1992 |
 |
| Stylised Owl |
| 1994 | 1997 |
 |
 |
| Cover | |
| Stylised Owl | Stylised Owl |
| 1999 | 2000 |
 |
 |
| Stylised Owl | Stylised Owl |
| 2000 | 2002 |
 |
 |
| Stylised Owl | Stylised Owl |
| 2003 | 2005 |
 |
 |
| Stylised Owl | Stylised Owl |
| 2009 | 2014 |
 |
 |
| Stylised Owl | Stylised Owl |