| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 25896 |
22.1%
|
| 2 | Studying, training | 970 |
0.8%
|
| 3 | housekeeping | 1022 |
0.9%
|
| 4 | Old, ill | 478 |
0.4%
|
| 5 | Others | 740 |
0.6%
|
| Sysmiss | 88254 |