| Value | Category | Cases | |
|---|---|---|---|
| 1 | Old/ illness | 7846 |
8.6%
|
| 2 | Housekeeping | 19766 |
21.8%
|
| 3 | Studying or Training | 26897 |
29.6%
|
| 4 | Others | 5693 |
6.3%
|
| Sysmiss | 30636 |