| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. No difficulty | 16849 |
91.3%
|
| 2 | 2. Some difficulty | 1038 |
5.6%
|
| 3 | 3. A lot of difficulty | 473 |
2.6%
|
| 4 | 4. Cannot do at all | 86 |
0.5%
|
| 5 | 5. Refused | 3 |
0%
|
| 6 | 6. Don't know | 10 |
0.1%
|
| Sysmiss | 4282 |