| Month | Number of messages |
|---|---|
| 2015 February | 12 |
| 2012 October | 2 |
| 2011 November | 1 |
| 2011 October | 3 |
| 2009 February | 2 |
| 2009 January | 2 |
| 2008 November | 3 |
| 2008 October | 5 |
| 2008 September | 3 |
| 2008 August | 3 |
| 2008 July | 1 |
| 2008 June | 1 |
| 2008 April | 2 |
| 2008 March | 2 |
| 2008 February | 4 |
| 2008 January | 10 |
| 2007 December | 9 |
| 2007 November | 8 |
| 2007 October | 10 |
| 2007 July | 3 |
| 2007 June | 4 |
| 2007 May | 15 |
| 2007 April | 14 |
| 2007 February | 3 |
| 2007 January | 2 |
| 2006 December | 8 |
| 2006 October | 6 |
| 2006 August | 1 |
| 2006 June | 6 |
| 2006 May | 5 |
| 2006 April | 8 |
| 2006 March | 5 |
| 2006 February | 9 |
| 2006 January | 3 |
| 2005 December | 7 |
| 2005 November | 20 |
| 2005 October | 15 |
| 2005 September | 32 |
| 2005 August | 129 |
| 2005 June | 11 |
| 2005 April | 1 |
| 2005 March | 1 |
| 2004 December | 2 |
| 2004 November | 31 |
| 2004 October | 33 |
| 2004 August | 4 |
| 2004 July | 16 |
| 2004 June | 18 |
| 2004 May | 11 |
| 2004 April | 16 |
| 2004 March | 9 |
| 2004 February | 11 |
| 2004 January | 17 |
| 2003 December | 112 |