| 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 |