| Value | Category | Cases | |
|---|---|---|---|
| 1 | some difficulty | 211 |
1%
|
| 2 | a lot of difficulty | 159 |
0.7%
|
| 3 | cannot do at all | 20 |
0.1%
|
| 98 | don't know | 10 |
0%
|
| 99 | refuse to answer | 0 |
0%
|
| Missing value | 21692 |
98.2%
|