| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 49 |
0.3%
|
| 2 | Twice | 26 |
0.2%
|
| 3 | Three times | 7 |
0%
|
| 4 | Four times | 6 |
0%
|
| 5 | More | 3 |
0%
|
| 6 | Never | 8466 |
53.4%
|
| 7 | Not Applicable | 7299 |
46%
|
| Sysmiss | 1525 |