| Jahr | Monat | Sichtungen |
|---|---|---|
| 2017 | 5 | 1 |
| 2017 | 4 | 80 |
| 2015 | 1 | 2 |
| 2014 | 11 | 3 |
| 2014 | 10 | 4 |
| 2014 | 9 | 165 |
| 2014 | 8 | 30 |
| 2014 | 6 | 1 |
| 2014 | 5 | 13 |
| 2014 | 4 | 36 |
| 2014 | 3 | 239 |
| 2014 | 2 | 7 |
| 2014 | 1 | 20 |
| 2013 | 12 | 6 |
| 2013 | 11 | 13 |
| 2013 | 10 | 29 |
| 2013 | 9 | 11 |
| 2013 | 8 | 80 |
| 2013 | 7 | 78 |
| 2013 | 6 | 247 |
| 2013 | 5 | 86 |
| 2013 | 4 | 45 |
| 2013 | 3 | 248 |
| 2013 | 2 | 145 |
| 2013 | 1 | 204 |
| 2012 | 12 | 254 |
| 2012 | 11 | 157 |
| 2012 | 10 | 200 |
| 2012 | 9 | 87 |
| 2012 | 8 | 269 |
| 2012 | 7 | 346 
|
| 2012 | 6 | 114 |
| 2012 | 5 | 4 |
| Durchschnitt | 98 | |
| Total | 3224 | |
