| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Once | 3621 | 3674 |
82.6%
|
| 2 | More than once | 750 | 772 |
17.4%
|
| 9 | 5 | 5 | ||
| Sysmiss | 2571 | 2100 |