| Value | Category | Cases | |
|---|---|---|---|
| 1 | I have never used | 1913 |
86.9%
|
| 2 | I don't use now | 113 |
5.1%
|
| 3 | Yes | 104 |
4.7%
|
| 4 | No | 72 |
3.3%
|
| Sysmiss | 55 |