| Month | Number of messages |
|---|---|
| 2017 September | 1 |
| 2014 November | 1 |
| 2014 October | 1 |
| 2013 January | 10 |
| 2012 October | 4 |
| 2012 September | 1 |
| 2012 July | 2 |
| 2012 May | 6 |
| 2012 April | 2 |
| 2012 March | 2 |
| 2011 May | 1 |
| 2011 April | 2 |
| 2010 March | 2 |
| 2010 January | 2 |
| 2009 December | 1 |
| 2009 October | 2 |
| 2009 August | 10 |
| 2009 July | 7 |
| 2009 June | 5 |
| 2009 May | 1 |
| 2008 September | 1 |
| 2008 August | 3 |
| 2008 July | 3 |
| 2008 June | 7 |
| 2008 March | 4 |
| 2008 January | 1 |
| 2007 May | 1 |
| 2007 April | 20 |
| 2007 March | 3 |
| 2006 December | 3 |
| 2006 November | 9 |
| 2006 October | 1 |
| 2006 September | 2 |
| 2006 August | 2 |
| 2006 July | 4 |
| 2006 June | 13 |
| 2006 May | 3 |
| 2006 April | 4 |
| 2006 March | 2 |
| 2006 February | 1 |
| 2006 January | 1 |
| 2005 October | 6 |
| 2005 September | 1 |
| 2005 August | 2 |