| 2011 | 2012 | 2013 | 2014 | 2015 | |
|---|---|---|---|---|---|
| Baden-Württemberg | 4 388 | 4 478 | 4 577 | 4 628 | 4 213 |
| Bayern | 10 322 | 10 466 | 10 537 | 10 679 | 9 589 |
| Berlin | 10 | 11 | 10 | 10 | 10 |
| Brandenburg | 2 408 | 2 580 | 2 662 | 2 607 | 2 324 |
| Bremen | 20 | 19 | 24 | 23 | 21 |
| Hamburg | 135 | 124 | 119 | 115 | 103 |
| Hessen | 1 851 | 1 852 | 1 980 | 1 910 | 1 701 |
| Mecklenburg-Vorpommern | 2 559 | 2 878 | 3 065 | 2 913 | 2 575 |
| Niedersachsen | 11 048 | 11 582 | 12 497 | 12 372 | 11 705 |
| Nordrhein-Westfalen | 7 005 | 7 331 | 7 965 | 7 635 | 7 174 |
| Rheinland-Pfalz | 2 395 | 2 538 | 2 859 | 2 782 | 2 580 |
| Saarland | 146 | 145 | 154 | 141 | 127 |
| Sachsen | 2 346 | 2 402 | 2 343 | 2 458 | 2 122 |
| Sachsen-Anhalt | 2 393 | 2 705 | 2 569 | 2 698 | 2 300 |
| Schleswig-Holstein | 3 520 | 3 640 | 3 926 | 3 611 | 3 372 |
| Thüringen | 1 696 | 1 832 | 1 795 | 1 800 | 1 541 |