| Value | Category | Cases | |
|---|---|---|---|
| 1 | only once | 825 |
98.2%
|
| 2 | more than once | 15 |
1.8%
|
| 9 | not applicable | 0 |
0%
|
| 9999995 | missing:impute | 0 |
0%
|
| Sysmiss | 2777 |