| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 2841956 |
85.4%
|
| 2 | Some difficulty | 120138 |
3.6%
|
| 3 | A lot of difficulty | 33888 |
1%
|
| 4 | Cannot do at all | 4064 |
0.1%
|
| 5 | Do not know | 1498 |
0%
|
| 8 | Not applicable | 325657 |
9.8%
|
| 9 | Unspecified | 1666 |
0.1%
|