| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 4378 |
97.2%
|
| 2 | Once | 52 |
1.2%
|
| 3 | More than once | 56 |
1.2%
|
| 4 | Not applicable | 3 |
0.1%
|
| Sysmiss | 17 |