| No. 28 December 2023 (PDF) | |
| No. 27 Mai 2022 (PDF) | |
| No. 26 April 2022 (PDF) | |
| No. 25 December 2021 (PDF) | |
| No. 24 May 2021 (PDF) | |
| No. 23 December 2020 (PDF) | |
No. 22 May 2020 (PDF) | |
No. 21 December 2019 (PDF) | |
No. 20 May 2019 (PDF) | |
No. 19 December 2018 (PDF) | |
No. 18 May 2018 (PDF) | |
No. 17 February 2018 (PDF) | |
No. 16 December 2017 (PDF) | |
No. 15 July 2017 (PDF) | |
No. 14 May 2017 (PDF) | |
No. 13 Februay 2017 (PDF) | |
No. 12 July 2016 (PDF) | |
No. 11 May 2016 (PDF) | |
No. 10 February 2016 (PDF) | |
No. 9 December 2015 (PDF) | |
No. 8 June 2015 (PDF) | |
No. 7 April 2015 (PDF) | |
No. 6 July 2014 (PDF) | |
No. 5 April 2014 (PDF) | |
No. 4 December 2013 (PDF) | |
No. 3 June 2013 (PDF) | |
No. 2 April 2013 (PDF only published in German) | |
No. 1 February 2013 (PDF only published in German) |