| High z | Low z | Neither | TOTAL | |
| High SNS | 8 | 0 | 1 | 9 |
| Low SNS | 0 | 12 | 0 | 12 |
| Neither | 10 | 26 | 4468 | 4504 |
| TOTAL | 18 | 38 | 4469 | 4525 |