| Jahr | Monat | Sichtungen |
|---|---|---|
| 2022 | 10 | 1 |
| 2019 | 1 | 1 |
| 2014 | 12 | 4 |
| 2014 | 4 | 2 |
| 2013 | 6 | 4 |
| 2012 | 12 | 1 |
| 2012 | 8 | 1 |
| 2012 | 4 | 2 |
| 2011 | 9 | 37 |
| 2011 | 3 | 1 |
| 2010 | 12 | 3 |
| 2010 | 11 | 2 |
| 2010 | 8 | 1 |
| 2010 | 5 | 16 |
| 2010 | 4 | 1 |
| 2010 | 3 | 1 |
| 2010 | 2 | 1 |
| 2010 | 1 | 3 |
| 2009 | 12 | 16 |
| 2009 | 11 | 5 |
| 2009 | 7 | 7 |
| 2009 | 6 | 6 |
| 2009 | 5 | 39 
|
| Durchschnitt | 7 | |
| Total | 155 | |