| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 5234 |
19.4%
|
| 2 | Studying, training | 57 |
0.2%
|
| 3 | housekeeping | 197 |
0.7%
|
| 4 | Old, ill | 39 |
0.1%
|
| 5 | Others | 117 |
0.4%
|
| Sysmiss | 21330 |