| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 2933695 |
69.3%
|
| 2 | Some difficulty | 268369 |
6.3%
|
| 3 | A lot of difficulty | 52382 |
1.2%
|
| 4 | Cannot do at all | 3500 |
0.1%
|
| 5 | Do not know | 2895 |
0.1%
|
| 8 | Not applicable | 376237 |
8.9%
|
| 9 | Unspecified | 593714 |
14%
|