| Value | Category | Cases | |
|---|---|---|---|
| 1 | No-no difficulty | 47693 |
99.5%
|
| 2 | Yes-some difficulty | 95 |
0.2%
|
| 3 | Yes- a lot of difficulty | 100 |
0.2%
|
| 4 | can not do at all | 34 |
0.1%
|
| Sysmiss | 22250 |