| Month | Number of messages |
|---|---|
| 2011 November | 1 |
| 2011 October | 2 |
| 2011 July | 5 |
| 2010 July | 22 |
| 2010 May | 2 |
| 2010 April | 6 |
| 2010 March | 11 |
| 2010 February | 8 |
| 2010 January | 5 |
| 2009 December | 48 |
| 2009 November | 35 |
| 2009 October | 30 |
| 2009 September | 19 |
| 2009 July | 47 |
| 2009 June | 42 |
| 2009 May | 15 |
| 2009 April | 2 |
| 2009 March | 39 |
| 2009 February | 97 |
| 2009 January | 16 |
| 2008 December | 15 |
| 2008 November | 52 |
| 2008 October | 1 |
| 2008 September | 28 |
| 2008 August | 12 |
| 2008 July | 39 |
| 2008 June | 16 |
| 2008 May | 31 |
| 2008 April | 2 |
| 2008 March | 1 |
| 2008 February | 16 |
| 2008 January | 9 |
| 2007 December | 2 |
| 2007 November | 32 |
| 2007 October | 3 |
| 2007 September | 14 |
| 2007 July | 8 |
| 2007 April | 3 |