| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 176134 |
96.3%
|
| 2 | Yes, some difficulty | 4891 |
2.7%
|
| 3 | Yes, a lot of difficulty | 1454 |
0.8%
|
| 4 | Cannot do at all | 336 |
0.2%
|
| Sysmiss | 27128 |