| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 1963 |
98.7%
|
| 2 | Once | 6 |
0.3%
|
| 3 | More than once | 1 |
0.1%
|
| 4 | Not applicable | 13 |
0.7%
|
| Sysmiss | 5 |