| 2012 | 2015 | 2018 | |
|---|---|---|---|
| Baden-Württemberg | 173 | 139 | 117 |
| Bayern | 186 | 123 | 133 |
| Berlin | 15 | 13 | 5 |
| Brandenburg | 70 | 98 | 111 |
| Hessen | 74 | 89 | 43 |
| Mecklenburg-Vorpommern | 33 | 18 | 38 |
| Niedersachsen | 86 | 106 | 183 |
| Nordrhein-Westfalen | 268 | 268 | 331 |
| Rheinland-Pfalz | 58 | 55 | 53 |
| Saarland | 15 | 12 | 6 |
| Sachsen | 55 | 34 | 6 |
| Sachsen-Anhalt | 109 | 84 | 35 |
| Schleswig-Holstein | 14 | 20 | 44 |
| Thüringen | 94 | 102 | 48 |