| Value | Category | Cases | |
|---|---|---|---|
| 1 | Easily | 581 |
11.6%
|
| 2 | With some difficulty | 225 |
4.5%
|
| 3 | With lots of difficulty | 143 |
2.9%
|
| 4 | Not at all | 2083 |
41.6%
|
| Missing value | 1975 |
39.4%
|