| Value | Category | Cases | |
|---|---|---|---|
| 12 | 12 | 862 |
8.1%
|
| 13 | 13 | 600 |
5.6%
|
| 14 | 14 | 708 |
6.7%
|
| 15 | 15 | 997 |
9.4%
|
| 16 | 16 | 1050 |
9.9%
|
| 17 | 17 | 1074 |
10.1%
|
| 18 | 18 | 1622 |
15.3%
|
| 19 | 19 | 653 |
6.1%
|
| 20 | 20 | 548 |
5.2%
|
| 21 | 21 | 2521 |
23.7%
|
| -4 | Not asked | 2467 | |
| -3 | Not applicable | 484 | |
| -2 | No answer | 0 |