| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 183 |
1.1%
|
| 2 | Twice | 103 |
0.6%
|
| 3 | Three times | 35 |
0.2%
|
| 4 | Four times | 12 |
0.1%
|
| 5 | More | 49 |
0.3%
|
| 6 | Never | 15648 |
97.6%
|
| Sysmiss | 1522 |