| 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | |
|---|---|---|---|---|---|---|---|---|
| Baden-Württemberg | 2 658 | 1 790 | 1 527 | 1 939 | 1 818 | 2 140 | 1 917 | 1 673 |
| Bayern | 3 927 | 3 203 | 3 108 | 4 112 | 3 676 | 4 454 | 4 002 | 3 394 |
| Hessen | 869 | 688 | 690 | 850 | 743 | 930 | 782 | 678 |
| Hamburg | 77 | 85 | 67 | 77 | 67 | 65 | 58 | 49 |
| Berlin | 12 | 12 | 5 | 5 | 6 | 5 | 5 | 4 |
| Brandenburg | 841 | 728 | 806 | 872 | 906 | 1 136 | 959 | 737 |
| Bremen | 31 | 44 | 9 | 10 | 22 | 32 | 15 | 15 |
| Nordrhein-Westfalen | 2 327 | 1 954 | 2 286 | 2 529 | 2 471 | 3 190 | 2 651 | 2 278 |
| Mecklenburg-Vorpommern | 1 107 | 716 | 829 | 935 | 1 065 | 1 311 | 1 086 | 892 |
| Saarland | 62 | 40 | 47 | 59 | 56 | 69 | 56 | 49 |
| Rheinland-Pfalz | 1 206 | 1 168 | 1 189 | 1 367 | 1 416 | 1 680 | 1 602 | 1 465 |
| Niedersachsen | 3 242 | 2 727 | 3 082 | 3 530 | 3 507 | 4 816 | 3 686 | 3 342 |
| Thüringen | 762 | 517 | 556 | 804 | 711 | 761 | 660 | 509 |
| Sachsen-Anhalt | 997 | 654 | 877 | 1 003 | 1 132 | 1 150 | 1 063 | 775 |
| Sachsen | 908 | 704 | 716 | 937 | 836 | 908 | 848 | 628 |
| Schleswig-Holstein | 1 148 | 766 | 905 | 939 | 957 | 1 359 | 1 045 | 863 |