| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 7 |
0%
|
| 2 | Twice | 2 |
0%
|
| 3 | Three times | 1 |
0%
|
| 4 | Four times | 5 |
0%
|
| 5 | More | 0 |
0%
|
| 6 | Never | 1461 |
9.7%
|
| 7 | Not Applicable | 13602 |
90.2%
|
| Sysmiss | 1247 |