Doubters origin
| Groningen | 21 | (56.8%) |
| Amsterdam | 7 | (18.9%) |
| Nederland | 1 | (2.7%) |
| Amersfoort | 1 | (2.7%) |
| Den Haag | 1 | (2.7%) |
| Haren | 1 | (2.7%) |
| Hoogezand | 1 | (2.7%) |
| Leeuwarden | 1 | (2.7%) |
| Leiderdorp | 1 | (2.7%) |
| Schildwolde | 1 | (2.7%) |
| ? | 1 | (2.7%) |
Cities with less then 1% of the total are not displayed
Map