| GWPZs | Very good [>15] | Good [10 - 15] | Medium [5 - 10] | Poor [3 - 5] | Very poor [<3] | Total |
| Very good [>15] | 5 | 0 | 0 | 0 | 0 | 5 |
| Good [10 - 15] | 0 | 6 | 0 | 0 | 0 | 6 |
| Medium [5 - 10] | 0 | 0 | 4 | 1 | 0 | 5 |
| Poor [3 - 5] | 0 | 0 | 1 | 3 | 0 | 4 |
| Very poor [<3] | 0 | 0 | 0 | 1 | 4 | 5 |
| Total | 5 | 6 | 5 | 5 | 4 | 25 |