| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 7727 |
33.3%
|
| 2 | Studying, training | 48 |
0.2%
|
| 3 | housekeeping | 184 |
0.8%
|
| 4 | Old, ill | 56 |
0.2%
|
| 5 | Others | 359 |
1.5%
|
| Sysmiss | 14823 |