| Value | Category | Cases | |
|---|---|---|---|
| 1 | some difficulty | 359 |
1.6%
|
| 2 | a lot of difficulty | 297 |
1.3%
|
| 3 | cannot do at all | 44 |
0.2%
|
| 98 | don't know | 25 |
0.1%
|
| 99 | refuse to answer | 1 |
0%
|
| Missing value | 21366 |
96.7%
|