| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 2139 |
84.2%
|
| 2 | Some difficulty | 297 |
11.7%
|
| 3 | A lot of difficulty | 100 |
3.9%
|
| 4 | Cannot do at all | 3 |
0.1%
|
| 97 | Don't know | 1 |
0%
|
| 99 | Refuse to answer | 0 |
0%
|