| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | 1 |
2.5%
|
|
| 2 | 1 |
2.5%
|
|
| 3 | 2 |
5%
|
|
| 5 | 3 |
7.5%
|
|
| 6 | 1 |
2.5%
|
|
| 8 | 1 |
2.5%
|
|
| 10 | 4 |
10%
|
|
| 15 | 3 |
7.5%
|
|
| 20 | 7 |
17.5%
|
|
| 25 | 4 |
10%
|
|
| 28 | 1 |
2.5%
|
|
| 30 | 2 |
5%
|
|
| 37 | 1 |
2.5%
|
|
| 39 | 1 |
2.5%
|
|
| 40 | 1 |
2.5%
|
|
| 50 | 1 |
2.5%
|
|
| 79 | 1 |
2.5%
|
|
| 100 | 5 |
12.5%
|
|
| Sysmiss | 210 |