| 2005 | 2010 | 2011 | 2012 | |
|---|---|---|---|---|
| Auckland | 2 701 | 3 051 | 3 064 | 2 981 |
| Canterbury | 2 747 | 3 167 | 2 958 | 2 769 |
| Waikato | 2 467 | 2 782 | 2 617 | 2 733 |
| Bay of Plenty | 1 249 | 1 467 | 1 428 | 1 392 |
| Northland | 1 030 | 1 191 | 1 101 | 1 211 |
| Hawke's Bay | 954 | 1 109 | 1 117 | 1 106 |
| Otago | 909 | 939 | 990 | 995 |
| Taranaki | 663 | 801 | 756 | 754 |
| Southland | 667 | 792 | 766 | 699 |
| West Coast | 147 | 224 | 214 | 220 |