| Value | Category | Cases | |
|---|---|---|---|
| 1 | Old/ illness | 8086 |
8.5%
|
| 2 | Housekeeping | 20724 |
21.9%
|
| 3 | Studying or Training | 28024 |
29.6%
|
| 4 | Others | 3942 |
4.2%
|
| Sysmiss | 33856 |