| Jahr | Monat | Sichtungen |
|---|---|---|
| 2020 | 3 | 14 |
| 2020 | 2 | 16 |
| 2016 | 3 | 1 |
| 2015 | 10 | 3 |
| 2015 | 9 | 1 |
| 2015 | 8 | 25 |
| 2015 | 7 | 25 |
| 2015 | 6 | 26 |
| 2015 | 5 | 45 |
| 2015 | 4 | 30 |
| 2015 | 3 | 36 |
| 2015 | 2 | 50 |
| 2015 | 1 | 162 
|
| 2014 | 12 | 31 |
| 2014 | 11 | 18 |
| 2014 | 10 | 6 |
| 2014 | 9 | 27 |
| 2014 | 8 | 14 |
| 2014 | 7 | 9 |
| 2014 | 6 | 27 |
| 2014 | 5 | 134 |
| 2014 | 4 | 6 |
| Durchschnitt | 32 | |
| Total | 706 | |