| 1990 | 2000 | 2005 | |
|---|---|---|---|
| Baden-Württemberg | 61 | 69 | 68 |
| Bayern | 66 | 69 | 68 |
| Berlin | 0 | ||
| Brandenburg | 50 | 52 | 62 |
| Bremen | 0 | 0 | |
| Hamburg | 74 | 0 | 0 |
| Hessen | 65 | 72 | 73 |
| Mecklenburg-Vorpommern | 58 | 69 | 75 |
| Niedersachsen | 70 | 82 | 82 |
| Nordrhein-Westfalen | 62 | 81 | 85 |
| Rheinland-Pfalz | 55 | 67 | 63 |
| Saarland | 55 | 65 | 63 |
| Sachsen | 61 | 65 | 74 |
| Sachsen-Anhalt | 52 | 71 | 72 |
| Schleswig-Holstein | 78 | 96 | 91 |
| Thüringen | 56 | 69 | 70 |