| Value | Category | Cases | |
|---|---|---|---|
| 1 | No-no difficulty | 70256 |
99.3%
|
| 2 | Yes-some difficulty | 195 |
0.3%
|
| 3 | Yes- a lot of difficulty | 185 |
0.3%
|
| 4 | can not do at all | 92 |
0.1%
|
| Sysmiss | 11050 |