| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 172 |
1.6%
|
| 2 | Once | 241 |
2.2%
|
| 3 | A few times | 1084 |
10%
|
| 4 | Many times | 9393 |
86.3%
|
| Sysmiss | 26 |