| Value | Category | Cases | |
|---|---|---|---|
| 1 | No, no difficulty | 87174 |
97.7%
|
| 2 | Yes, some difficulty | 1194 |
1.3%
|
| 3 | Yes, a lot of difficulty | 495 |
0.6%
|
| 4 | Cannot do at all | 391 |
0.4%
|
| Sysmiss | 10925 |