| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 3549 |
72.7%
|
| 2 | One | 1210 |
24.8%
|
| 3 | Two | 88 |
1.8%
|
| 4 | Three or more | 37 |
0.8%
|
| Sysmiss | 19929 |