| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very low technical quality | 1 |
0.6%
|
| 10 | Very high technical quality | 13 |
7.6%
|
| 11 | Don't know | 34 |
19.9%
|
| -99 | 6 |
3.5%
|
|
| 2 | 2 |
1.2%
|
|
| 3 | 4 |
2.3%
|
|
| 4 | 7 |
4.1%
|
|
| 5 | 17 |
9.9%
|
|
| 6 | 13 |
7.6%
|
|
| 7 | 33 |
19.3%
|
|
| 8 | 30 |
17.5%
|
|
| 9 | 11 |
6.4%
|
|
| Sysmiss | 20 |