| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 2098 |
8.3%
|
| 2 | Studying, training | 1537 |
6.1%
|
| 3 | housekeeping | 9206 |
36.5%
|
| 4 | Old, ill | 5082 |
20.1%
|
| 5 | Others | 202 |
0.8%
|
| Sysmiss | 7120 |