| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 2342 |
79.6%
|
| 1 | 1/4 | 438 |
14.9%
|
| 2 | 1/2 | 85 |
2.9%
|
| 3 | 3/4 | 32 |
1.1%
|
| 4 | All or nearly all | 46 |
1.6%
|
| Sysmiss | 2050 |