| Value | Category | Cases | |
|---|---|---|---|
| 1 | Basic level | 1855 |
7.7%
|
| 2 | Intermediate level | 11399 |
47.1%
|
| 3 | Advanced level | 10423 |
43.1%
|
| 4 | Skill not needed | 515 |
2.1%
|
| Sysmiss | 27559 |