| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 7810 |
26.3%
|
| 2 | Studying, training | 189 |
0.6%
|
| 3 | housekeeping | 277 |
0.9%
|
| 4 | Old, ill | 135 |
0.5%
|
| 5 | Others | 402 |
1.4%
|
| Sysmiss | 20896 |