| Value | Category | Cases | |
|---|---|---|---|
| 1 | No - no difficulty | 37601 |
98.7%
|
| 2 | Yes - some difficulty | 326 |
0.9%
|
| 3 | Yes - a lot of difficulty | 74 |
0.2%
|
| 4 | Cannot, at all | 100 |
0.3%
|
| Sysmiss | 8769 |