| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 5471 |
20.8%
|
| 2 | Studying, training | 242 |
0.9%
|
| 3 | housekeeping | 289 |
1.1%
|
| 4 | Old, ill | 95 |
0.4%
|
| 5 | Others | 3 |
0%
|
| Sysmiss | 20202 |