| Jahr | Monat | Sichtungen |
|---|---|---|
| 2015 | 7 | 1 |
| 2015 | 6 | 41 |
| 2015 | 5 | 1 |
| 2015 | 1 | 2 |
| 2014 | 11 | 1 |
| 2014 | 10 | 44 |
| 2014 | 3 | 26 |
| 2013 | 5 | 29 |
| 2013 | 4 | 39 |
| 2013 | 3 | 51 |
| 2013 | 2 | 28 |
| 2013 | 1 | 45 |
| 2012 | 12 | 43 |
| 2012 | 9 | 37 |
| 2012 | 7 | 63 |
| 2012 | 6 | 78 |
| 2012 | 5 | 52 |
| 2012 | 4 | 36 |
| 2012 | 3 | 69 |
| 2012 | 2 | 57 |
| 2012 | 1 | 74 |
| 2011 | 12 | 110 |
| 2011 | 11 | 62 |
| 2011 | 10 | 63 |
| 2011 | 9 | 47 |
| 2011 | 8 | 20 |
| 2011 | 7 | 37 |
| 2011 | 6 | 105 |
| 2011 | 5 | 62 |
| 2011 | 4 | 118 
|
| 2011 | 3 | 60 |
| 2011 | 2 | 98 |
| 2011 | 1 | 7 |
| Durchschnitt | 49 | |
| Total | 1606 | |
