| Jahr | Monat | Sichtungen |
|---|---|---|
| 2021 | 5 | 1 |
| 2021 | 1 | 1 |
| 2019 | 8 | 1 |
| 2019 | 2 | 1 |
| 2018 | 9 | 1 |
| 2018 | 8 | 1 |
| 2018 | 5 | 1 |
| 2018 | 3 | 1 |
| 2017 | 12 | 2 |
| 2017 | 3 | 1 |
| 2016 | 11 | 2 |
| 2016 | 10 | 1 |
| 2016 | 9 | 1 |
| 2016 | 6 | 2 |
| 2016 | 5 | 1 |
| 2016 | 2 | 1 |
| 2016 | 1 | 2 |
| 2015 | 12 | 1 |
| 2015 | 11 | 1 |
| 2015 | 10 | 1 |
| 2015 | 7 | 1 |
| 2015 | 4 | 1 |
| 2014 | 12 | 2 |
| 2014 | 11 | 1 |
| 2014 | 8 | 2 |
| 2014 | 5 | 3 |
| 2014 | 4 | 1 |
| 2014 | 3 | 1 |
| 2013 | 11 | 1 |
| 2013 | 9 | 1 |
| 2013 | 8 | 1 |
| 2013 | 6 | 2 |
| 2013 | 5 | 1 |
| 2013 | 3 | 1 |
| 2013 | 2 | 3 |
| 2013 | 1 | 2 |
| 2012 | 12 | 2 |
| 2012 | 7 | 2 |
| 2012 | 6 | 1 |
| 2012 | 5 | 1 |
| 2012 | 4 | 7 |
| 2012 | 3 | 6 |
| 2012 | 2 | 4 |
| 2012 | 1 | 14 |
| 2011 | 12 | 8 |
| 2011 | 11 | 6 |
| 2011 | 10 | 9 |
| 2011 | 9 | 6 |
| 2011 | 8 | 4 |
| 2011 | 7 | 5 |
| 2011 | 6 | 5 |
| 2011 | 5 | 3 |
| 2011 | 4 | 3 |
| 2011 | 3 | 5 |
| 2011 | 2 | 14 |
| 2011 | 1 | 9 |
| 2010 | 12 | 9 |
| 2010 | 11 | 7 |
| 2010 | 10 | 6 |
| 2010 | 9 | 22 |
| 2010 | 8 | 18 |
| 2010 | 7 | 18 |
| 2010 | 6 | 14 |
| 2010 | 5 | 13 |
| 2010 | 4 | 12 |
| 2010 | 3 | 12 |
| 2010 | 2 | 11 |
| 2010 | 1 | 20 |
| 2009 | 12 | 10 |
| 2009 | 11 | 9 |
| 2009 | 10 | 21 |
| 2009 | 9 | 13 |
| 2009 | 8 | 21 |
| 2009 | 7 | 12 |
| 2009 | 6 | 18 |
| 2009 | 5 | 14 |
| 2009 | 4 | 9 |
| 2009 | 3 | 10 |
| 2009 | 2 | 18 |
| 2009 | 1 | 26 |
| 2008 | 12 | 33 |
| 2008 | 11 | 61 |
| 2008 | 10 | 118 |
| 2008 | 9 | 167 |
| 2008 | 8 | 88 |
| 2008 | 7 | 111 |
| 2008 | 6 | 381 
|
| 2008 | 5 | 281 |
| Durchschnitt | 20 | |
| Total | 1745 | |