| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 6197 |
21.7%
|
| 2 | Studying, training | 235 |
0.8%
|
| 3 | housekeeping | 205 |
0.7%
|
| 4 | Old, ill | 116 |
0.4%
|
| 5 | Others | 101 |
0.4%
|
| Sysmiss | 21705 |