| Value | Category | Cases | |
|---|---|---|---|
| 1 | Old/ illness | 7269 |
8.6%
|
| 2 | Housekeeping | 18882 |
22.3%
|
| 3 | Studying or Training | 24692 |
29.2%
|
| 4 | Others | 2858 |
3.4%
|
| Sysmiss | 30847 |