Jodis
Observations/month
| Month | 1972–2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | total | |
|---|
| Januar | | | | | | | | | | | | | | | | | |
| Februar | | | | | | | | | | | | | | | | | |
| Mars | | | | | | | | | | | | | | | | | |
| April | | | | | | | | | | | | | | | | | |
| Mai | 12 | | 7 | 6 | | 17 | 1 | 10 | 2 | 7 | 7 | | | 1 | 2 | 27 % | |
| Juni | 20 | 18 | 20 | 17 | 4 | 27 | 12 | 22 | 13 | 7 | 4 | 3 | 1 | | 3 | 63 % | |
| Juli | 3 | 12 | | 4 | | | 5 | | 1 | 1 | | | | | | 10 % | |
| August | | | | | | | 1 | | | | | | | | | 0 % | |
| September | | | | | | | | | | 1 | | | | | | 0 % | |
| Oktober | | | | | | | | | | | | | | | | | |
| November | | | | | | | | | | | | | | | | | |
| Desember | | | | | | | | | | | | | | | | | |