| Low z | High z | Neither | TOTAL | |
| Low SNS | 51 | 0 | 2 | 53 |
| High SNS | 0 | 17 | 3 | 20 |
| Neither | 34 | 8 | 3913 | 3955 |
| TOTAL | 85 | 25 | 3918 | 4028 |