| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 6264 |
20.9%
|
| 2 | Studying, training | 199 |
0.7%
|
| 3 | housekeeping | 198 |
0.7%
|
| 4 | Old, ill | 115 |
0.4%
|
| 5 | Others | 221 |
0.7%
|
| Sysmiss | 22953 |