| Value | Category | Cases | |
|---|---|---|---|
| 0 | 6 |
0.8%
|
|
| 12 | 63 |
8.8%
|
|
| 15 | 157 |
21.8%
|
|
| 18 | 122 |
17%
|
|
| 21 | 354 |
49.2%
|
|
| 3 | 1 |
0.1%
|
|
| 6 | 1 |
0.1%
|
|
| 9 | 15 |
2.1%
|