| Value | Category | Cases | |
|---|---|---|---|
| 1 | Easily | 374 |
10.9%
|
| 2 | With some difficulty | 1882 |
55%
|
| 3 | With much difficulty | 736 |
21.5%
|
| 4 | Unable to do | 432 |
12.6%
|
| Sysmiss | 40881 |