| 2012 | 2015 | 2018 | |
|---|---|---|---|
| Baden-Württemberg | 43 | 33 | 133 |
| Bayern | 80 | 89 | 97 |
| Berlin | 15 | 27 | 20 |
| Hessen | 7 | 7 | 10 |
| Mecklenburg-Vorpommern | 21 | 73 | 69 |
| Niedersachsen | 4 | 51 | 77 |
| Rheinland-Pfalz | 15 | 13 | |
| Saarland | 14 | 12 | 27 |
| Sachsen | 82 | 98 | 81 |
| Sachsen-Anhalt | 72 | 96 | 64 |
| Schleswig-Holstein | 7 | ||
| Nordrhein-Westfalen | 178 | 125 | 114 |
| Brandenburg | 62 | 13 | 33 |
| Thüringen | 80 | 54 | 35 |