| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 20 |
7.9%
|
| 2 | Once | 26 |
10.3%
|
| 3 | Few times | 41 |
16.2%
|
| 4 | Many times | 166 |
65.6%
|
| Sysmiss | 19747 |