| Value | Category | Cases | |
|---|---|---|---|
| 1 | No | 299 |
15%
|
| 2 | Once | 2 |
0.1%
|
| 3 | More than once | 3 |
0.2%
|
| 4 | Not applicable | 1681 |
84.6%
|
| Sysmiss | 3 |