| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 6485 |
22.5%
|
| 2 | Studying, training | 224 |
0.8%
|
| 3 | housekeeping | 234 |
0.8%
|
| 4 | Old, ill | 103 |
0.4%
|
| 5 | Others | 167 |
0.6%
|
| Sysmiss | 21571 |