| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 6653 |
22.4%
|
| 2 | Studying, training | 246 |
0.8%
|
| 3 | housekeeping | 243 |
0.8%
|
| 4 | Old, ill | 130 |
0.4%
|
| 5 | Others | 190 |
0.6%
|
| Sysmiss | 22288 |