| Value | Category | Cases | |
|---|---|---|---|
| 1 | High extent | 499 |
21.6%
|
| 2 | Moderate extent | 620 |
26.8%
|
| 3 | Low extent | 329 |
14.2%
|
| 4 | Very low extent | 374 |
16.2%
|
| 5 | Don't know | 490 |
21.2%
|
| Sysmiss | 17486 |