| Month | Number of messages |
|---|---|
| 2014 July | 1 |
| 2014 June | 1 |
| 2014 May | 1 |
| 2013 March | 2 |
| 2011 October | 4 |
| 2011 June | 1 |
| 2010 June | 8 |
| 2010 March | 1 |
| 2009 February | 3 |
| 2009 January | 6 |
| 2008 September | 3 |
| 2008 August | 6 |
| 2008 June | 10 |
| 2008 May | 5 |
| 2008 April | 1 |
| 2008 March | 11 |
| 2008 January | 7 |
| 2007 December | 5 |
| 2007 November | 11 |
| 2007 October | 17 |
| 2007 September | 6 |
| 2007 July | 5 |
| 2007 June | 16 |
| 2007 May | 25 |
| 2007 April | 42 |
| 2007 March | 31 |
| 2007 February | 7 |
| 2007 January | 3 |
| 2006 December | 39 |
| 2006 November | 25 |
| 2006 October | 7 |
| 2006 September | 7 |
| 2006 August | 19 |
| 2006 July | 23 |
| 2006 June | 97 |
| 2006 May | 39 |
| 2006 April | 104 |
| 2006 March | 24 |
| 2006 February | 11 |
| 2006 January | 42 |
| 2005 December | 13 |
| 2005 November | 27 |
| 2005 October | 48 |
| 2005 September | 72 |
| 2005 August | 7 |
| 2005 July | 2 |
| 2005 June | 58 |
| 2005 May | 14 |
| 2005 April | 56 |
| 2005 March | 51 |
| 2005 February | 50 |
| 2005 January | 18 |
| 2004 December | 83 |
| 2004 November | 20 |