| Value | Category | Cases | |
|---|---|---|---|
| 1 | No, no difficulty | 86847 |
97.3%
|
| 2 | Yes, some difficulty | 1814 |
2%
|
| 3 | Yes, a lot of difficulty | 421 |
0.5%
|
| 4 | Cannot do at all | 172 |
0.2%
|
| Sysmiss | 10925 |