| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 5422 |
19.5%
|
| 2 | Studying, training | 55 |
0.2%
|
| 3 | housekeeping | 246 |
0.9%
|
| 4 | Old, ill | 53 |
0.2%
|
| 5 | Others | 100 |
0.4%
|
| Sysmiss | 21994 |