| Value | Category | Cases | |
|---|---|---|---|
| 1 | a.No difficulty | 18708 |
78.1%
|
| 2 | b.Some difficulty | 821 |
3.4%
|
| 3 | c.A lot of difficulty | 248 |
1%
|
| 4 | d.Cannot do at all | 31 |
0.1%
|
| 5 | e.Refused | 3 |
0%
|
| 6 | f.Don't know | 6 |
0%
|
| Missing value | 4137 |
17.3%
|