| Jahr | Monat | Sichtungen |
|---|---|---|
| 2012 | 7 | 3 |
| 2012 | 6 | 3 |
| 2012 | 5 | 1 |
| 2012 | 4 | 2 |
| 2012 | 3 | 6 |
| 2012 | 2 | 21 |
| 2012 | 1 | 32 |
| 2011 | 12 | 12 |
| 2011 | 11 | 10 |
| 2011 | 10 | 19 |
| 2011 | 9 | 18 |
| 2011 | 8 | 18 |
| 2011 | 7 | 37 |
| 2011 | 6 | 55 |
| 2011 | 5 | 88 |
| 2011 | 4 | 90 |
| 2011 | 3 | 229 |
| 2011 | 2 | 265 |
| 2011 | 1 | 282 |
| 2010 | 12 | 322 |
| 2010 | 11 | 160 |
| 2010 | 10 | 701 
|
| 2010 | 9 | 533 |
| 2010 | 8 | 272 |
| 2010 | 7 | 294 |
| 2010 | 6 | 540 |
| 2010 | 5 | 519 |
| 2010 | 4 | 507 |
| 2010 | 3 | 83 |
| 2010 | 2 | 156 |
| 2010 | 1 | 39 |
| 2009 | 10 | 1 |
| 2009 | 9 | 3 |
| 2009 | 7 | 8 |
| 2009 | 6 | 1 |
| 2009 | 2 | 1 |
| 2008 | 12 | 81 |
| 2008 | 11 | 68 |
| 2008 | 10 | 9 |
| 2008 | 9 | 52 |
| 2008 | 8 | 78 |
| 2008 | 7 | 74 |
| 2008 | 6 | 69 |
| 2008 | 5 | 144 |
| Durchschnitt | 134 | |
| Total | 5906 | |