| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 5268 |
17.8%
|
| 2 | Studying, training | 141 |
0.5%
|
| 3 | housekeeping | 298 |
1%
|
| 4 | Old, ill | 133 |
0.4%
|
| 5 | Others | 106 |
0.4%
|
| Sysmiss | 23645 |