| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 88 |
0.6%
|
| 2 | Twice | 30 |
0.2%
|
| 3 | Three times | 13 |
0.1%
|
| 4 | Four times | 3 |
0%
|
| 5 | More | 10 |
0.1%
|
| 6 | Never | 14671 |
99%
|
| Sysmiss | 513 |