| 2005 | 2010 | 2013 | |
|---|---|---|---|
| Noord-Brabant | 113,690 | 121,320 | 138,420 |
| Gelderland | 59,390 | 70,680 | 87,290 |
| Overijssel | 35,940 | 50,770 | 56,600 |
| Limburg | 17,420 | 26,550 | 41,060 |
| Utrecht | 11,510 | 17,740 | 20,730 |
| Friesland | 16,710 | 16,130 | 15,830 |
| Drenthe | 10,010 | 9,150 | 14,330 |
| Zuid-Holland | 10,540 | 13,970 | 12,750 |
| Noord-Holland | 8,700 | 12,700 | 11,520 |
| Groningen | 6,130 | 9,660 | 8,120 |
| Flevoland | 1,460 | 3,010 | 5,120 |
| Zeeland | 730 | 1,160 | 790 |