Letters from the minister
| 2008 | ||||
| February | March | April | May | June/July |
| July/August | September | October | November | December/January 09 |
| 2007 | ||||
| February | March | April | May | June/July |
| August | September | October | November | December/January 08 |
| 2006 | ||||
| February * | March * | April * | May | June/July |
| August | September | October | November | December/January 07 |
* = not currently available