| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. No difficulty | 1598 |
97%
|
| 2 | 2. Some difficulty | 30 |
1.8%
|
| 3 | 3. A lot of difficulty | 19 |
1.2%
|
| 4 | 5. Refused | 1 |
0.1%
|
| Sysmiss | 70 |