| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 5319 |
18.7%
|
| 2 | Studying, training | 80 |
0.3%
|
| 3 | housekeeping | 264 |
0.9%
|
| 4 | Old, ill | 81 |
0.3%
|
| 5 | Others | 218 |
0.8%
|
| Sysmiss | 22413 |