| Value | Category | Cases | |
|---|---|---|---|
| -99 | DK | 7 |
0.5%
|
| -88 | Missing | 0 |
0%
|
| -77 | NA | 22 |
1.6%
|
| 1 | Very clearly demarcated | 1040 |
76.5%
|
| 2 | Fairly well demarcated | 237 |
17.4%
|
| 3 | Poorly demarcated | 54 |
4%
|
| Sysmiss | 215 |