| Value | Category | Cases | |
|---|---|---|---|
| 12 | 12 | 384 |
21.7%
|
| 13 | 13 | 113 |
6.4%
|
| 14 | 14 | 107 |
6%
|
| 15 | 15 | 113 |
6.4%
|
| 16 | 16 | 104 |
5.9%
|
| 17 | 17 | 92 |
5.2%
|
| 18 | 18 | 105 |
5.9%
|
| 19 | 19 | 67 |
3.8%
|
| 20 | 20 | 80 |
4.5%
|
| 21 | 21 | 607 |
34.3%
|
| -4 | Not asked | 0 | |
| -3 | Not applicable | 65 | |
| -2 | No answer | 0 |