| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 6519 |
27.7%
|
| 2 | Studying, training | 71 |
0.3%
|
| 3 | housekeeping | 330 |
1.4%
|
| 4 | Old, ill | 164 |
0.7%
|
| 5 | Others | 368 |
1.6%
|
| Sysmiss | 16118 |