| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 6737 |
28.7%
|
| 2 | Studying, training | 93 |
0.4%
|
| 3 | housekeeping | 378 |
1.6%
|
| 4 | Old, ill | 169 |
0.7%
|
| 5 | Others | 392 |
1.7%
|
| Sysmiss | 15666 |