| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 6877 |
29.8%
|
| 2 | Studying, training | 139 |
0.6%
|
| 3 | housekeeping | 387 |
1.7%
|
| 4 | Old, ill | 144 |
0.6%
|
| 5 | Others | 254 |
1.1%
|
| Sysmiss | 15242 |