| 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 |