| Jahr | Monat | Sichtungen |
|---|---|---|
| 2020 | 10 | 1 |
| 2020 | 9 | 1 |
| 2020 | 8 | 8 |
| 2020 | 7 | 4 |
| 2020 | 6 | 1 |
| 2020 | 5 | 1 |
| 2020 | 4 | 1 |
| 2020 | 3 | 1 |
| 2020 | 2 | 2 |
| 2020 | 1 | 2 |
| 2019 | 12 | 2 |
| 2019 | 11 | 14 |
| 2019 | 10 | 11 |
| 2019 | 7 | 63 
|
| 2019 | 6 | 8 |
| 2019 | 5 | 11 |
| 2019 | 4 | 7 |
| 2019 | 3 | 1 |
| 2019 | 1 | 1 |
| 2018 | 12 | 4 |
| 2018 | 9 | 2 |
| 2018 | 8 | 1 |
| 2018 | 7 | 8 |
| Durchschnitt | 7 | |
| Total | 155 | |