| Value | Category | Cases | |
|---|---|---|---|
| 13 | 2 |
1%
|
|
| 14 | 6 |
3%
|
|
| 15 | 23 |
11.4%
|
|
| 16 | 36 |
17.9%
|
|
| 17 | 114 |
56.7%
|
|
| 18 | 13 |
6.5%
|
|
| 19 | 6 |
3%
|
|
| 20 | 1 |
0.5%
|
|
| Sysmiss | 347 |