| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. cannot do it at all | 1 |
0.1%
|
| 1 | 1. yes, a lot of difficulty | 14 |
1%
|
| 2 | 2. yes, some difficulty | 147 |
10.3%
|
| 3 | 3. no, no difficulty | 1267 |
88.7%
|
| Sysmiss | 134 |