| Value | Category | Cases | |
|---|---|---|---|
| 1 | a.No difficulty | 2620 |
10.8%
|
| 2 | b.Some difficulty | 81 |
0.3%
|
| 3 | c.A lot of difficulty | 40 |
0.2%
|
| 4 | d.Cannot do at all | 12 |
0%
|
| 5 | f.Don't know | 0 |
0%
|
| Missing value | 21619 |
88.7%
|