| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1.Per day | 2 |
0.2%
|
| 2 | 2.Per Month | 4 |
0.4%
|
| 3 | 3.Per semester | 8 |
0.9%
|
| 4 | 4.Per Academic year | 171 |
18.8%
|
| 5 | 5.Per one school period | 328 |
36%
|
| 6 | 6.Not Applicable | 398 |
43.6%
|
| 9 | 9.Missing | 1 |
0.1%
|
| Sysmiss | 5457 |