| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 1929 |
97%
|
| 2 | Once | 23 |
1.2%
|
| 3 | More than once | 13 |
0.7%
|
| 4 | Not applicable | 20 |
1%
|
| Sysmiss | 3 |