| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 times | 3228 |
88.1%
|
| 2 | 1 or 2 times | 341 |
9.3%
|
| 3 | 3 to 9 times | 55 |
1.5%
|
| 4 | 10 or more times | 38 |
1%
|
| Sysmiss | 144 |