| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 1913 |
96.2%
|
| 2 | Once | 38 |
1.9%
|
| 3 | More than once | 26 |
1.3%
|
| 4 | Not applicable | 6 |
0.3%
|
| Sysmiss | 5 |