| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 4445 |
98.6%
|
| 2 | Once | 26 |
0.6%
|
| 3 | More than once | 14 |
0.3%
|
| 4 | Not applicable | 4 |
0.1%
|
| Sysmiss | 17 |