| Jahr | Monat | Sichtungen |
|---|---|---|
| 2015 | 12 | 315 |
| 2015 | 11 | 1028 |
| 2015 | 10 | 1130 |
| 2015 | 9 | 928 |
| 2015 | 8 | 1135 |
| 2015 | 7 | 1463 |
| 2015 | 6 | 1446 |
| 2015 | 5 | 648 |
| 2015 | 4 | 647 |
| 2015 | 3 | 649 |
| 2015 | 2 | 206 |
| 2015 | 1 | 550 |
| 2014 | 12 | 454 |
| 2014 | 11 | 412 |
| 2014 | 10 | 342 |
| 2014 | 9 | 550 |
| 2014 | 8 | 855 |
| 2014 | 7 | 840 |
| 2014 | 6 | 697 |
| 2014 | 5 | 460 |
| 2014 | 4 | 706 |
| 2014 | 3 | 629 |
| 2014 | 2 | 1767 
|
| 2014 | 1 | 1268 |
| 2013 | 12 | 40 |
| 2013 | 11 | 7 |
| Durchschnitt | 737 | |
| Total | 19172 | |