| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. No difficulty | 17853 |
96.7%
|
| 2 | 2. Some difficulty | 370 |
2%
|
| 3 | 3. A lot of difficulty | 152 |
0.8%
|
| 4 | 4. Cannot do at all | 57 |
0.3%
|
| 5 | 5. Refused | 5 |
0%
|
| 6 | 6. Don't know | 22 |
0.1%
|
| Sysmiss | 4282 |