| Jahr | Monat | Sichtungen |
|---|---|---|
| 2021 | 11 | 1 |
| 2021 | 10 | 1 |
| 2021 | 7 | 2 |
| 2021 | 6 | 1 |
| 2020 | 11 | 1 |
| 2020 | 2 | 3 |
| 2020 | 1 | 3 |
| 2019 | 12 | 3 |
| 2019 | 11 | 4 |
| 2019 | 9 | 2 |
| 2018 | 8 | 2 |
| 2018 | 7 | 1 |
| 2018 | 6 | 2 |
| 2017 | 12 | 1 |
| 2017 | 10 | 2 |
| 2017 | 9 | 3 |
| 2017 | 8 | 3 |
| 2017 | 1 | 1 |
| 2016 | 11 | 1 |
| 2016 | 10 | 2 |
| 2016 | 9 | 1 |
| 2016 | 8 | 2 |
| 2016 | 7 | 2 |
| 2016 | 5 | 1 |
| 2016 | 4 | 1 |
| 2015 | 9 | 3 |
| 2015 | 7 | 2 |
| 2015 | 6 | 2 |
| 2015 | 5 | 1 |
| 2015 | 4 | 3 |
| 2015 | 3 | 3 |
| 2015 | 2 | 1 |
| 2015 | 1 | 7 |
| 2014 | 12 | 2 |
| 2014 | 11 | 4 |
| 2014 | 9 | 4 |
| 2014 | 7 | 3 |
| 2014 | 6 | 1 |
| 2014 | 5 | 2 |
| 2014 | 1 | 4 |
| 2013 | 12 | 7 |
| 2013 | 11 | 9 
|
| Durchschnitt | 2 | |
| Total | 104 | |
