| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 2867155 |
86.1%
|
| 2 | Some difficulty | 106942 |
3.2%
|
| 3 | A lot of difficulty | 22433 |
0.7%
|
| 4 | Cannot do at all | 4112 |
0.1%
|
| 5 | Do not know | 1006 |
0%
|
| 8 | Not applicable | 325657 |
9.8%
|
| 9 | Unspecified | 1562 |
0%
|