| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 18 |
7.9%
|
| 2 | Twice | 9 |
4%
|
| 3 | Three times | 4 |
1.8%
|
| 4 | Four times | 0 |
0%
|
| 5 | More | 5 |
2.2%
|
| 6 | Never | 191 |
84.1%
|
| Sysmiss | 17325 |