| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
1.6%
|
| 0 | 1 |
0.4%
|
|
| 1 | 15 |
6%
|
|
| 2 | 13 |
5.2%
|
|
| 3 | 9 |
3.6%
|
|
| 4 | 1 |
0.4%
|
|
| 5 | 25 |
10%
|
|
| 6 | 2 |
0.8%
|
|
| 7 | 3 |
1.2%
|
|
| 8 | 1 |
0.4%
|
|
| 10 | 42 |
16.7%
|
|
| 12 | 6 |
2.4%
|
|
| 15 | 28 |
11.2%
|
|
| 17 | 2 |
0.8%
|
|
| 18 | 1 |
0.4%
|
|
| 20 | 45 |
17.9%
|
|
| 22 | 1 |
0.4%
|
|
| 25 | 16 |
6.4%
|
|
| 30 | 26 |
10.4%
|
|
| 32 | 1 |
0.4%
|
|
| 35 | 2 |
0.8%
|
|
| 40 | 3 |
1.2%
|
|
| 50 | 1 |
0.4%
|
|
| 55 | 1 |
0.4%
|
|
| 80 | 1 |
0.4%
|
|
| 82 | 1 |
0.4%
|
|
| Sysmiss | 113 |