| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 10 |
0.1%
|
| 2 | Twice | 1 |
0%
|
| 3 | Three times | 0 |
0%
|
| 4 | Four times | 2 |
0%
|
| 5 | More | 0 |
0%
|
| 6 | Never | 629 |
4.7%
|
| 7 | Not applicable | 12609 |
95.2%
|
| Sysmiss | 64 |