| Value | Category | Cases | |
|---|---|---|---|
| 1 | Old/ illness | 6227 |
9.8%
|
| 2 | Housekeeping | 14632 |
23.1%
|
| 3 | Studying or Training | 17279 |
27.2%
|
| 4 | Others | 2004 |
3.2%
|
| Sysmiss | 23304 |