| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Very able | 3814 |
56.7%
|
| 2 | 2. Pretty able | 2488 |
37%
|
| 3 | 3. Not too able | 368 |
5.5%
|
| 4 | 4. Not able at all | 46 |
0.7%
|
| 5 | 5. Missing | 14 |
0.2%
|
| Sysmiss | 1924 |