| 2012 | 2015 | 2018 | |
|---|---|---|---|
| Baden-Württemberg | 1 716 | 1 874 | 1 849 |
| Bayern | 2 580 | 2 672 | 2 702 |
| Berlin | 297 | 268 | 298 |
| Brandenburg | 848 | 829 | 1 171 |
| Bremen | 120 | 136 | 131 |
| Hamburg | 231 | 216 | 139 |
| Hessen | 832 | 918 | 1 165 |
| Mecklenburg-Vorpommern | 616 | 587 | 646 |
| Niedersachsen | 2 272 | 2 275 | 2 542 |
| Nordrhein-Westfalen | 3 034 | 2 916 | 3 232 |
| Rheinland-Pfalz | 877 | 894 | 974 |
| Saarland | 292 | 274 | 136 |
| Sachsen | 1 162 | 1 165 | 824 |
| Sachsen-Anhalt | 609 | 669 | 724 |
| Schleswig-Holstein | 574 | 679 | 734 |
| Thüringen | 558 | 547 | 437 |