| Jahr | Monat | Sichtungen |
|---|---|---|
| 2011 | 6 | 28 |
| 2011 | 5 | 23 |
| 2010 | 11 | 5 |
| 2010 | 9 | 6 |
| 2010 | 8 | 9 |
| 2010 | 7 | 18 |
| 2010 | 5 | 2 |
| 2010 | 4 | 4 |
| 2010 | 1 | 6 |
| 2009 | 12 | 2 |
| 2009 | 10 | 11 |
| 2009 | 9 | 10 |
| 2009 | 8 | 2 |
| 2009 | 7 | 6 |
| 2009 | 6 | 11 |
| 2009 | 5 | 1 |
| 2009 | 3 | 6 |
| 2009 | 2 | 6 |
| 2009 | 1 | 6 |
| 2008 | 12 | 2 |
| 2008 | 11 | 19 |
| 2008 | 10 | 3 |
| 2008 | 8 | 1 |
| 2008 | 7 | 3 |
| 2008 | 6 | 12 |
| 2008 | 5 | 90 
|
| Durchschnitt | 11 | |
| Total | 292 | |