| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 6121 |
23.1%
|
| 2 | Studying, training | 191 |
0.7%
|
| 3 | housekeeping | 231 |
0.9%
|
| 4 | Old, ill | 117 |
0.4%
|
| 5 | Others | 1 |
0%
|
| Sysmiss | 19813 |