| Month | Number of messages |
|---|---|
| 2015 February | 2 |
| 2012 August | 1 |
| 2012 July | 13 |
| 2009 June | 3 |
| 2008 December | 1 |
| 2008 July | 3 |
| 2008 April | 1 |
| 2007 September | 12 |
| 2007 June | 2 |
| 2007 April | 3 |
| 2007 March | 16 |
| 2007 February | 10 |
| 2007 January | 14 |
| 2006 December | 2 |
| 2006 November | 24 |
| 2006 October | 34 |
| 2006 September | 9 |
| 2006 July | 31 |
| 2006 June | 15 |
| 2006 May | 63 |
| 2006 April | 17 |
| 2006 March | 57 |
| 2006 February | 93 |
| 2006 January | 44 |
| 2005 December | 14 |
| 2005 November | 6 |
| 2005 September | 4 |
| 2005 August | 40 |
| 2005 July | 37 |
| 2005 June | 13 |
| 2005 May | 43 |
| 2005 April | 89 |
| 2005 March | 2 |
| 2004 December | 13 |
| 2004 November | 11 |
| 2004 October | 36 |
| 2004 September | 15 |
| 2004 August | 9 |
| 2004 July | 8 |
| 2004 June | 3 |
| 2004 May | 12 |
| 2004 April | 30 |
| 2004 March | 46 |
| 2004 February | 45 |
| 2004 January | 35 |
| 2003 December | 25 |
| 2003 November | 18 |
| 2003 October | 80 |