| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 6600 |
29.2%
|
| 2 | Studying, training | 78 |
0.3%
|
| 3 | housekeeping | 326 |
1.4%
|
| 4 | Old, ill | 123 |
0.5%
|
| 5 | Others | 356 |
1.6%
|
| Sysmiss | 15154 |