| Month | Number of messages |
|---|---|
| 2014 September | 1 |
| 2012 December | 4 |
| 2011 October | 1 |
| 2011 April | 15 |
| 2009 November | 3 |
| 2009 October | 5 |
| 2009 September | 1 |
| 2009 July | 10 |
| 2009 June | 2 |
| 2009 March | 2 |
| 2008 September | 8 |
| 2008 August | 7 |
| 2008 June | 1 |
| 2008 March | 4 |
| 2008 February | 1 |
| 2008 January | 5 |
| 2007 December | 3 |
| 2007 November | 3 |
| 2007 October | 3 |
| 2007 September | 5 |
| 2007 August | 4 |
| 2007 July | 5 |
| 2007 June | 1 |
| 2007 May | 3 |
| 2007 April | 3 |
| 2007 March | 1 |
| 2007 February | 2 |
| 2007 January | 1 |
| 2006 November | 1 |
| 2006 October | 2 |
| 2006 September | 7 |
| 2006 August | 10 |
| 2006 July | 6 |
| 2006 June | 11 |
| 2006 May | 10 |
| 2006 January | 3 |
| 2005 December | 4 |
| 2005 November | 14 |
| 2005 October | 9 |
| 2005 September | 2 |
| 2005 August | 2 |
| 2005 July | 2 |
| 2005 June | 5 |
| 2005 April | 17 |
| 2004 December | 10 |
| 2004 November | 7 |
| 2004 October | 17 |
| 2004 September | 2 |
| 2004 July | 4 |
| 2004 June | 1 |
| 2004 May | 2 |
| 2004 April | 21 |
| 2004 February | 15 |
| 2004 January | 30 |
| 2003 December | 17 |