| Jahr | Monat | Sichtungen |
|---|---|---|
| 2018 | 11 | 30 |
| 2018 | 10 | 20 |
| 2018 | 1 | 12 |
| 2017 | 12 | 19 |
| 2017 | 11 | 34 |
| 2017 | 6 | 37 |
| 2017 | 4 | 28 |
| 2017 | 2 | 24 |
| 2017 | 1 | 30 |
| 2016 | 11 | 65 |
| 2016 | 10 | 135 
|
| 2016 | 9 | 25 |
| 2016 | 8 | 45 |
| 2016 | 7 | 19 |
| 2016 | 4 | 33 |
| 2015 | 10 | 49 |
| 2015 | 9 | 1 |
| 2015 | 8 | 57 |
| 2015 | 7 | 87 |
| 2015 | 6 | 17 |
| 2015 | 5 | 26 |
| 2014 | 5 | 36 |
| 2014 | 3 | 21 |
| 2013 | 12 | 1 |
| 2013 | 10 | 103 |
| 2013 | 8 | 23 |
| 2013 | 7 | 27 |
| 2013 | 6 | 41 |
| Durchschnitt | 37 | |
| Total | 1045 | |