| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 1937 |
97.4%
|
| 2 | Once | 9 |
0.5%
|
| 3 | More than once | 1 |
0.1%
|
| 4 | Not applicable | 0 |
0%
|
| Sysmiss | 41 |