| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 5142 |
17.8%
|
| 2 | Studying, training | 380 |
1.3%
|
| 3 | housekeeping | 368 |
1.3%
|
| 4 | Old, ill | 114 |
0.4%
|
| 5 | Others | 150 |
0.5%
|
| Sysmiss | 22791 |