| 1990 | 2000 | 2005 | |
|---|---|---|---|
| Baden-Württemberg | 57 | 66 | 64 |
| Bayern | 60 | 63 | 62 |
| Brandenburg | 37 | 43 | 52 |
| Hamburg | 63 | ||
| Hessen | 59 | 66 | 65 |
| Mecklenburg-Vorpommern | 47 | 63 | 69 |
| Niedersachsen | 56 | 69 | 74 |
| Nordrhein-Westfalen | 56 | 74 | 79 |
| Rheinland-Pfalz | 50 | 59 | 57 |
| Saarland | 47 | 57 | 57 |
| Sachsen | 58 | 59 | 66 |
| Sachsen-Anhalt | 47 | 64 | 67 |
| Schleswig-Holstein | 70 | 87 | 85 |
| Thüringen | 55 | 65 | 66 |