| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 7460 |
31.5%
|
| 2 | Studying, training | 108 |
0.5%
|
| 3 | housekeeping | 239 |
1%
|
| 4 | Old, ill | 104 |
0.4%
|
| 5 | Others | 304 |
1.3%
|
| Sysmiss | 15451 |