| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 4783 |
18.1%
|
| 2 | Studying, training | 232 |
0.9%
|
| 3 | housekeeping | 298 |
1.1%
|
| 4 | Old, ill | 98 |
0.4%
|
| 5 | Others | 66 |
0.2%
|
| Sysmiss | 20985 |