| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. No difficulty | 2551 |
98.2%
|
| 2 | 2. Some difficulty | 19 |
0.7%
|
| 3 | 3. A lot of difficulty | 15 |
0.6%
|
| 4 | 4. Cannot do at all | 8 |
0.3%
|
| 5 | 5. Refused | 1 |
0%
|
| 6 | 6. Don't know | 3 |
0.1%
|
| Sysmiss | 20144 |