| Value | Category | Cases | |
|---|---|---|---|
| 1 | I do this activity using a computer | 105 |
1.1%
|
| 2 | I do this activity using a cellphone | 644 |
6.8%
|
| 3 | I don’t do this activity at all | 8648 |
91.5%
|
| 4 | I do this activity using both computer and cellphone | 51 |
0.5%
|
| Sysmiss | 15660 |