| Value | Category | Cases | |
|---|---|---|---|
| 1 | At home | 99 |
7.3%
|
| 2 | Internet coffee | 150 |
11.1%
|
| 3 | Education institution | 418 |
30.8%
|
| 4 | At work | 633 |
46.6%
|
| 5 | Others | 57 |
4.2%
|
| Sysmiss | 174685 |