| Value | Category | Cases | |
|---|---|---|---|
| 1 | Convenience in work | 21920 |
19.4%
|
| 2 | Studying, training | 246 |
0.2%
|
| 3 | housekeeping | 881 |
0.8%
|
| 4 | Old, ill | 181 |
0.2%
|
| 5 | Others | 560 |
0.5%
|
| Sysmiss | 88937 |