| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 5844 |
22.4%
|
| 2 | Studying, training | 218 |
0.8%
|
| 3 | housekeeping | 267 |
1%
|
| 4 | Old, ill | 114 |
0.4%
|
| 5 | Others | 2 |
0%
|
| Sysmiss | 19689 |