| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very common | 419 |
19.1%
|
| 2 | Fairly common | 584 |
26.6%
|
| 3 | Fairly rare | 535 |
24.3%
|
| 4 | Very rare | 538 |
24.5%
|
| 9 | Don't know | 122 |
5.6%
|