| 1990 | 2000 | 2005 | 2010 | 2011 | |
|---|---|---|---|---|---|
| Bayern | 14 148 | 14 302 | 14 154 | 13 161 | 12 867 |
| Baden-Württemberg | 6 809 | 6 984 | 6 904 | 6 790 | 6 771 |
| Niedersachsen | 6 370 | 6 481 | 6 071 | 5 946 | 5 844 |
| Nordrhein-Westfalen | 5 782 | 5 323 | 5 319 | 5 122 | 5 150 |
| Schleswig-Holstein | 4 360 | 5 041 | 5 016 | 4 507 | 4 378 |
| Rheinland-Pfalz | 4 198 | 3 913 | 3 942 | 3 764 | 3 806 |
| Hessen | 3 382 | 3 474 | 3 494 | 3 474 | |
| Mecklenburg-Vorpommern | 2 590 | 2 771 | 3 016 | 3 049 | |
| Sachsen | 2 212 | 2 207 | 2 194 | 2 209 | |
| Brandenburg | 1 539 | 1 650 | 1 586 | 1 650 | |
| Thüringen | 1 514 | 1 459 | 1 369 | 1 354 | |
| Sachsen-Anhalt | 1 068 | 1 092 | 1 149 | 1 134 | |
| Berlin | 376 | 560 | 581 | 748 | 777 |
| Hamburg | 259 | 293 | 317 | 316 | |
| Saarland | 309 | 326 | 300 | 256 | 269 |
| Bremen | 89 | 98 | 113 | 116 |