| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 4187 |
76.2%
|
| 2 | One | 1159 |
21.1%
|
| 3 | Two | 99 |
1.8%
|
| 4 | Three or more | 47 |
0.9%
|
| Sysmiss | 19616 |