| Jahr | Monat | Sichtungen |
|---|---|---|
| 2024 | 4 | 1 |
| 2023 | 10 | 2 |
| 2023 | 8 | 1 |
| 2023 | 6 | 1 |
| 2023 | 5 | 1 |
| 2023 | 4 | 1 |
| 2023 | 2 | 5 |
| 2022 | 12 | 1 |
| 2022 | 11 | 4 |
| 2022 | 10 | 4 |
| 2022 | 6 | 1 |
| 2022 | 5 | 1 |
| 2022 | 2 | 1 |
| 2021 | 12 | 1 |
| 2021 | 7 | 1 |
| 2021 | 6 | 2 |
| 2021 | 5 | 1 |
| 2021 | 4 | 2 |
| 2021 | 2 | 1 |
| 2021 | 1 | 1 |
| 2020 | 12 | 1 |
| 2020 | 11 | 2 |
| 2020 | 10 | 4 |
| 2020 | 8 | 1 |
| 2020 | 7 | 2 |
| 2020 | 6 | 2 |
| 2020 | 3 | 5 |
| 2020 | 2 | 6 |
| 2020 | 1 | 4 |
| 2019 | 8 | 1 |
| 2019 | 4 | 2 |
| 2018 | 8 | 3 |
| 2018 | 7 | 5 |
| 2018 | 6 | 1 |
| 2018 | 4 | 1 |
| 2018 | 3 | 3 |
| 2018 | 1 | 2 |
| 2017 | 11 | 2 |
| 2017 | 10 | 16 |
| 2017 | 5 | 3 |
| 2017 | 4 | 1 |
| 2016 | 12 | 9 |
| 2016 | 9 | 20 
|
| 2016 | 4 | 3 |
| 2015 | 6 | 1 |
| 2015 | 5 | 3 |
| Durchschnitt | 3 | |
| Total | 136 | |