| Month | Number of messages |
|---|---|
| 2014 September | 1 |
| 2013 September | 2 |
| 2012 November | 4 |
| 2012 October | 3 |
| 2012 September | 1 |
| 2011 October | 1 |
| 2011 September | 2 |
| 2011 August | 1 |
| 2011 March | 1 |
| 2011 January | 1 |
| 2010 December | 1 |
| 2010 April | 2 |
| 2010 March | 1 |
| 2010 January | 2 |
| 2009 October | 3 |
| 2009 August | 14 |
| 2009 July | 11 |
| 2009 June | 1 |
| 2009 May | 1 |
| 2009 April | 5 |
| 2009 March | 15 |
| 2009 February | 2 |
| 2008 December | 6 |
| 2008 November | 1 |
| 2008 October | 2 |
| 2008 August | 3 |
| 2008 May | 1 |
| 2008 March | 2 |
| 2008 February | 1 |
| 2008 January | 4 |
| 2007 December | 5 |
| 2007 July | 3 |
| 2007 June | 8 |
| 2007 May | 4 |
| 2007 April | 15 |
| 2007 March | 7 |
| 2007 February | 19 |
| 2007 January | 6 |
| 2006 December | 11 |
| 2006 November | 18 |
| 2006 October | 13 |
| 2006 September | 31 |
| 2006 August | 48 |
| 2006 July | 8 |
| 2006 June | 14 |
| 2006 May | 5 |
| 2006 April | 15 |
| 2006 March | 14 |
| 2006 February | 14 |
| 2006 January | 58 |
| 2005 December | 24 |
| 2005 November | 40 |
| 2005 October | 1 |
| 2005 September | 3 |
| 2005 August | 8 |
| 2005 July | 26 |
| 2005 June | 7 |
| 2005 May | 115 |