| Value | Category | Cases | |
|---|---|---|---|
| 20 | 2 |
0.9%
|
|
| 22 | 1 |
0.4%
|
|
| 26 | 2 |
0.9%
|
|
| 27 | 1 |
0.4%
|
|
| 28 | 2 |
0.9%
|
|
| 30 | 18 |
7.7%
|
|
| 31 | 208 |
88.9%
|
|
| 99 | 99. Don't know | 0 |
0%
|