| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very low technical quality | 1 |
1.4%
|
| 2 | 1 |
1.4%
|
|
| 3 | 3 |
4.2%
|
|
| 4 | 3 |
4.2%
|
|
| 5 | 9 |
12.7%
|
|
| 6 | 9 |
12.7%
|
|
| 7 | 18 |
25.4%
|
|
| 8 | 17 |
23.9%
|
|
| 9 | 6 |
8.5%
|
|
| 10 | Very high technical quality | 4 |
5.6%
|
| 11 | Don't know | 18 | |
| Sysmiss | 20 |