| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 181568 |
99.3%
|
| 2 | Yes, some difficulty | 804 |
0.4%
|
| 3 | Yes, a lot of difficulty | 282 |
0.2%
|
| 4 | Cannot do at all | 161 |
0.1%
|
| Sysmiss | 27128 |