| Value | Category | Cases | |
|---|---|---|---|
| 1 | Only one | 764 |
3.1%
|
| 2 | 2-4 | 2398 |
9.6%
|
| 3 | 5-9 | 952 |
3.8%
|
| 4 | 10-19 | 656 |
2.6%
|
| 5 | 20+ | 2285 |
9.1%
|
| Sysmiss | 17924 |