| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 3963 |
74.5%
|
| 2 | One | 1211 |
22.8%
|
| 3 | Two | 104 |
2%
|
| 4 | Three or more | 44 |
0.8%
|
| Sysmiss | 19838 |