| Jahr | Monat | Sichtungen |
|---|---|---|
| 2021 | 11 | 2 |
| 2021 | 6 | 1 |
| 2021 | 3 | 1 |
| 2020 | 7 | 3 |
| 2020 | 6 | 2 |
| 2020 | 5 | 1 |
| 2019 | 9 | 1 |
| 2019 | 8 | 1 |
| 2019 | 4 | 4 |
| 2019 | 1 | 1 |
| 2018 | 12 | 1 |
| 2018 | 11 | 1 |
| 2018 | 9 | 1 |
| 2018 | 6 | 1 |
| 2018 | 5 | 2 |
| 2018 | 4 | 1 |
| 2018 | 1 | 2 |
| 2017 | 12 | 3 |
| 2017 | 11 | 5 |
| 2017 | 9 | 4 |
| 2017 | 8 | 14 
|
| 2017 | 7 | 1 |
| Durchschnitt | 2 | |
| Total | 53 | |