| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 21100 |
18.2%
|
| 2 | Studying, training | 560 |
0.5%
|
| 3 | housekeeping | 1390 |
1.2%
|
| 4 | Old, ill | 427 |
0.4%
|
| 5 | Others | 455 |
0.4%
|
| Sysmiss | 92220 |