| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 3173 |
14.3%
|
| 2 | Studying, training | 72 |
0.3%
|
| 3 | housekeeping | 120 |
0.5%
|
| 4 | Old, ill | 63 |
0.3%
|
| 5 | Others | 90 |
0.4%
|
| Sysmiss | 18664 |