| Value | Category | Cases | |
|---|---|---|---|
| 1 | No, no difficulty | 14277 |
99.1%
|
| 2 | Yes, some difficulty | 73 |
0.5%
|
| 3 | Yes, a lot of difficulty | 34 |
0.2%
|
| 4 | Yes, cannot do at all | 17 |
0.1%
|
| Sysmiss | 1891 |