| Jahr | Monat | Sichtungen |
|---|---|---|
| 2017 | 11 | 1 |
| 2015 | 4 | 1 |
| 2014 | 12 | 6 |
| 2014 | 11 | 7 |
| 2014 | 10 | 5 |
| 2014 | 9 | 6 |
| 2014 | 8 | 2 |
| 2014 | 7 | 2 |
| 2014 | 2 | 1 |
| 2013 | 12 | 15 |
| 2013 | 9 | 2 |
| 2013 | 8 | 8 |
| 2013 | 7 | 3 |
| 2013 | 6 | 1 |
| 2013 | 5 | 2 |
| 2013 | 4 | 7 |
| 2013 | 3 | 1 |
| 2013 | 2 | 2 |
| 2013 | 1 | 2 |
| 2012 | 12 | 3 |
| 2012 | 11 | 9 |
| 2012 | 10 | 3 |
| 2012 | 9 | 5 |
| 2012 | 8 | 5 |
| 2012 | 7 | 5 |
| 2012 | 6 | 2 |
| 2012 | 5 | 5 |
| 2012 | 4 | 11 |
| 2012 | 3 | 8 |
| 2012 | 2 | 7 |
| 2012 | 1 | 1 |
| 2011 | 12 | 3 |
| 2011 | 11 | 5 |
| 2011 | 10 | 13 |
| 2011 | 9 | 5 |
| 2011 | 8 | 4 |
| 2011 | 7 | 13 |
| 2011 | 6 | 10 |
| 2011 | 5 | 5 |
| 2011 | 4 | 4 |
| 2011 | 3 | 8 |
| 2011 | 2 | 4 |
| 2011 | 1 | 4 |
| 2010 | 12 | 9 |
| 2010 | 11 | 10 |
| 2010 | 10 | 21 |
| 2010 | 9 | 45 |
| 2010 | 8 | 52 |
| 2010 | 7 | 47 |
| 2010 | 6 | 25 |
| 2010 | 5 | 20 |
| 2010 | 4 | 19 |
| 2010 | 3 | 20 |
| 2010 | 2 | 52 |
| 2010 | 1 | 22 |
| 2009 | 12 | 36 |
| 2009 | 11 | 27 |
| 2009 | 10 | 5 |
| 2009 | 9 | 3 |
| 2009 | 8 | 2 |
| 2009 | 7 | 13 |
| 2009 | 6 | 99 
|
| 2009 | 5 | 90 |
| 2009 | 4 | 89 |
| 2009 | 3 | 93 |
| 2009 | 2 | 45 |
| 2009 | 1 | 21 |
| 2008 | 12 | 25 |
| 2008 | 11 | 21 |
| 2008 | 10 | 60 |
| 2008 | 9 | 55 |
| 2008 | 8 | 5 |
| Durchschnitt | 17 | |
| Total | 1247 | |