| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 1 |
0.2%
|
| 2 | One | 47 |
10.7%
|
| 3 | Two | 112 |
25.4%
|
| 4 | Three or more | 281 |
63.7%
|
| Sysmiss | 96 |