| Value | Category | Cases | |
|---|---|---|---|
| 12 | 12 | 30 |
3.2%
|
| 13 | 13 | 99 |
10.5%
|
| 14 | 14 | 154 |
16.4%
|
| 15 | 15 | 119 |
12.7%
|
| 16 | 16 | 89 |
9.5%
|
| 17 | 17 | 64 |
6.8%
|
| 18 | 18 | 70 |
7.5%
|
| 19 | 19 | 67 |
7.1%
|
| 20 | 20 | 40 |
4.3%
|
| 21 | 21 | 207 |
22%
|
| -4 | Not asked | 0 | |
| -3 | Not applicable | 15 | |
| -2 | No answer | 0 |