| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 6035 |
22.3%
|
| 2 | Studying, training | 176 |
0.7%
|
| 3 | housekeeping | 202 |
0.7%
|
| 4 | Old, ill | 112 |
0.4%
|
| 5 | Others | 2 |
0%
|
| Sysmiss | 20505 |