| Value | Category | Cases | |
|---|---|---|---|
| 1 | a.No difficulty | 20141 |
84.1%
|
| 2 | b.Some difficulty | 1622 |
6.8%
|
| 3 | c.A lot of difficulty | 615 |
2.6%
|
| 4 | d.Cannot do at all | 25 |
0.1%
|
| 5 | e.Refused | 1 |
0%
|
| 6 | f.Don't know | 2 |
0%
|
| Missing value | 1548 |
6.5%
|