| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 458109 |
88.6%
|
| 2 | Some difficulty | 47738 |
9.2%
|
| 3 | A lot of difficulty | 8709 |
1.7%
|
| 4 | Cannot do at all | 1009 |
0.2%
|
| 9 | Don't know | 1562 |
0.3%
|
| Sysmiss | 88895 |