| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 4931 |
17.4%
|
| 2 | Studying, training | 102 |
0.4%
|
| 3 | housekeeping | 311 |
1.1%
|
| 4 | Old, ill | 111 |
0.4%
|
| 5 | Others | 176 |
0.6%
|
| Sysmiss | 22630 |