| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 1946 |
97.9%
|
| 2 | Once | 29 |
1.5%
|
| 3 | More than once | 8 |
0.4%
|
| 4 | Not applicable | 2 |
0.1%
|
| Sysmiss | 3 |