| Value | Category | Cases | |
|---|---|---|---|
| 15 | 2 |
0.4%
|
|
| 16 | 8 |
1.6%
|
|
| 17 | 246 |
48.9%
|
|
| 18 | 247 |
49.1%
|
|
| Sysmiss | 34 |