| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 181064 |
99%
|
| 2 | Yes, some difficulty | 1078 |
0.6%
|
| 3 | Yes, a lot of difficulty | 350 |
0.2%
|
| 4 | Cannot do at all | 323 |
0.2%
|
| Sysmiss | 27128 |