| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. No difficulty | 17865 |
96.8%
|
| 2 | 2. Some difficulty | 327 |
1.8%
|
| 3 | 3. A lot of difficulty | 131 |
0.7%
|
| 4 | 4. Cannot do at all | 123 |
0.7%
|
| 5 | 5. Refused | 2 |
0%
|
| 6 | 6. Don't know | 11 |
0.1%
|
| Sysmiss | 4282 |