| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 6852 |
93.6%
|
| 2 | Some difficulty | 384 |
5.2%
|
| 3 | A lot of difficulty | 79 |
1.1%
|
| 4 | Cannot do at all | 4 |
0.1%
|
| 9 | Refused/No answer | 0 |
0%
|
| Sysmiss | 541 |