| Jahr | Monat | Sichtungen |
|---|---|---|
| 2023 | 5 | 1 |
| 2022 | 9 | 2 |
| 2022 | 6 | 16 |
| 2020 | 3 | 51 |
| 2020 | 2 | 1 |
| 2019 | 4 | 4 |
| 2019 | 3 | 16 |
| 2019 | 2 | 8 |
| 2018 | 7 | 1 |
| 2018 | 5 | 25 |
| 2018 | 4 | 64 |
| 2018 | 3 | 9 |
| 2016 | 9 | 1 |
| 2016 | 5 | 1 |
| 2016 | 1 | 1 |
| 2015 | 12 | 2 |
| 2015 | 8 | 1 |
| 2015 | 2 | 1 |
| 2014 | 12 | 10 |
| 2014 | 9 | 5 |
| 2014 | 2 | 1 |
| 2013 | 12 | 1 |
| 2013 | 10 | 51 |
| 2013 | 9 | 73 |
| 2013 | 8 | 28 |
| 2013 | 7 | 87 
|
| Durchschnitt | 18 | |
| Total | 461 | |