| Value | Category | Cases | |
|---|---|---|---|
| 18 | 3 |
3.7%
|
|
| 19 | 2 |
2.5%
|
|
| 20 | 3 |
3.7%
|
|
| 21 | 6 |
7.4%
|
|
| 22 | 8 |
9.9%
|
|
| 23 | 17 |
21%
|
|
| 24 | 9 |
11.1%
|
|
| 25 | 9 |
11.1%
|
|
| 26 | 5 |
6.2%
|
|
| 27 | 2 |
2.5%
|
|
| 28 | 3 |
3.7%
|
|
| 30 | 1 |
1.2%
|
|
| 31 | 2 |
2.5%
|
|
| 32 | 3 |
3.7%
|
|
| 33 | 1 |
1.2%
|
|
| 35 | 2 |
2.5%
|
|
| 99 | 99. don't know | 5 |
6.2%
|
| Sysmiss | 18 |