| 2012 | 2015 | 2018 | |
|---|---|---|---|
| Baden-Württemberg | 75 | 77 | 303 |
| Bayern | 432 | 241 | 98 |
| Brandenburg | 147 | 89 | 8 |
| Hessen | 36 | 53 | |
| Mecklenburg-Vorpommern | 150 | 69 | |
| Niedersachsen | 112 | 53 | |
| Nordrhein-Westfalen | 7 | 9 | 28 |
| Rheinland-Pfalz | 8 | 31 | |
| Sachsen | 36 | 68 | |
| Sachsen-Anhalt | 11 | 14 | |
| Schleswig-Holstein | 78 | 33 | 4 |
| Thüringen | 21 | 32 | 16 |