| Value | Category | Cases | |
|---|---|---|---|
| 0 | 11 |
1.8%
|
|
| 12 | 30 |
4.8%
|
|
| 15 | 33 |
5.3%
|
|
| 18 | 28 |
4.5%
|
|
| 21 | 477 |
76.1%
|
|
| 3 | 1 |
0.2%
|
|
| 6 | 9 |
1.4%
|
|
| 9 | 38 |
6.1%
|