| Partij | SV 2003 | SV 2006 | TK 2003 | TK 2006 |
| CDA | 23 | 20 | 44 | 41 |
| PvdA | 41 | 31 | 42 | 33 |
| VVD | 23 | 19 | 28 | 22 |
| SP | 13 | 31 | 9 | 25 |
| Fortuyn | 10 | 2 | 8 | 0 |
| GroenLinks | 16 | 13 | 8 | 7 |
| D66 | 7 | 4 | 6 | 3 |
| ChristenUnie | 3 | 5 | 3 | 6 |
| SGP | 3 | 2 | 2 | 2 |
| PvdD | 3 | 6 | 0 | 2 |
| PvdV | - | 16 | - | 9 |
| EénNL | - | 1 | - | 0 |
| overige partijen | 8 | 0 | 0 | 0 |