| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2 | 22 |
1.1%
|
| 2 | 3 | 41 |
2%
|
| 3 | 4 | 103 |
5.1%
|
| 4 | 5 | 180 |
9%
|
| 5 | 6 | 255 |
12.7%
|
| 6 | 7 | 232 |
11.6%
|
| 7 | 8 | 288 |
14.4%
|
| 8 | 9 | 190 |
9.5%
|
| 9 | 10 | 188 |
9.4%
|
| 10 | 11 | 129 |
6.4%
|
| 11 | 12 | 118 |
5.9%
|
| 12 | 13 | 67 |
3.3%
|
| 13 | 14 | 48 |
2.4%
|
| 14 | 15+ | 145 |
7.2%
|
| Missing value | 2 |