| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 5955 |
20.2%
|
| 2 | Studying, training | 306 |
1%
|
| 3 | housekeeping | 307 |
1%
|
| 4 | Old, ill | 87 |
0.3%
|
| 5 | Others | 22 |
0.1%
|
| Sysmiss | 22806 |