| Value | Category | Cases | |
|---|---|---|---|
| 1 | 15 |
3.3%
|
|
| 3 | 15 |
3.3%
|
|
| 4 | 4 |
0.9%
|
|
| 6 | 2 |
0.4%
|
|
| 7 | 5 |
1.1%
|
|
| 8 | 2 |
0.4%
|
|
| 9 | 3 |
0.7%
|
|
| 12 | 1 |
0.2%
|
|
| Missing value | 412 |
89.8%
|