| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very low technical quality | 1 |
1.5%
|
| 2 | 1 |
1.5%
|
|
| 3 | 1 |
1.5%
|
|
| 4 | 2 |
3%
|
|
| 5 | 8 |
12.1%
|
|
| 6 | 10 |
15.2%
|
|
| 7 | 14 |
21.2%
|
|
| 8 | 19 |
28.8%
|
|
| 9 | 7 |
10.6%
|
|
| 10 | Very high technical quality | 3 |
4.5%
|
| 11 | Don't know | 18 | |
| Sysmiss | 22 |