| 2000 | 2005 | 2010 | 2011 | |
|---|---|---|---|---|
| Nordrhein-Westfalen | 7 259 | 6 416 | 6 102 | 5 999 |
| Baden-Württemberg | 5 810 | 5 854 | 5 764 | 5 617 |
| Bayern | 5 272 | 5 050 | 4 733 | 4 712 |
| Niedersachsen | 4 524 | 3 976 | 3 862 | 3 965 |
| Hessen | 3 088 | 3 091 | 2 919 | 2 889 |
| Rheinland-Pfalz | 1 870 | 1 801 | 1 648 | 1 631 |
| Schleswig-Holstein | 1 644 | 1 499 | 1 504 | 1 513 |
| Brandenburg | 1 627 | 1 634 | 1 438 | 1 438 |
| Berlin | 1 802 | 1 304 | 1 371 | 1 383 |
| Sachsen-Anhalt | 2 486 | 1 051 | 953 | 950 |
| Thüringen | 1 091 | 944 | 922 | 915 |
| Mecklenburg-Vorpommern | 1 389 | 1 069 | 716 | 711 |
| Hamburg | 857 | 832 | 841 | 708 |
| Saarland | 529 | 346 | 349 | 335 |
| Bremen | 405 | 324 | 285 | 264 |