| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 2938804 |
88.3%
|
| 2 | Some difficulty | 45197 |
1.4%
|
| 3 | A lot of difficulty | 11269 |
0.3%
|
| 4 | Cannot do at all | 5514 |
0.2%
|
| 5 | Do not know | 780 |
0%
|
| 8 | Not applicable | 325657 |
9.8%
|
| 9 | Unspecified | 1646 |
0%
|