| Jahr | Monat | Sichtungen |
|---|---|---|
| 2018 | 5 | 1 |
| 2018 | 4 | 7 |
| 2018 | 3 | 12 |
| 2018 | 2 | 13 |
| 2018 | 1 | 5 |
| 2017 | 12 | 2 |
| 2017 | 11 | 15 |
| 2017 | 10 | 34 |
| 2017 | 9 | 4 |
| 2017 | 8 | 13 |
| 2017 | 7 | 8 |
| 2017 | 6 | 9 |
| 2017 | 5 | 9 |
| 2017 | 4 | 4 |
| 2017 | 3 | 11 |
| 2017 | 2 | 19 |
| 2017 | 1 | 18 |
| 2016 | 12 | 2 |
| 2016 | 11 | 2 |
| 2016 | 10 | 1 |
| 2016 | 9 | 3 |
| 2016 | 8 | 18 |
| 2016 | 7 | 40 |
| 2016 | 6 | 41 |
| 2016 | 5 | 19 |
| 2016 | 4 | 1 |
| 2016 | 3 | 1 |
| 2016 | 2 | 4 |
| 2016 | 1 | 3 |
| Average | / Monat | 11.0 |
| Total | - | 319 |