| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 11 |
5.5%
|
| 0 | 162 |
81.4%
|
|
| 1 | 1 |
0.5%
|
|
| 2 | 1 |
0.5%
|
|
| 5 | 5 |
2.5%
|
|
| 6 | 1 |
0.5%
|
|
| 10 | 2 |
1%
|
|
| 15 | 1 |
0.5%
|
|
| 20 | 3 |
1.5%
|
|
| 30 | 2 |
1%
|
|
| 40 | 1 |
0.5%
|
|
| 45 | 1 |
0.5%
|
|
| 50 | 1 |
0.5%
|
|
| 52 | 1 |
0.5%
|
|
| 70 | 1 |
0.5%
|
|
| 80 | 1 |
0.5%
|
|
| 95 | 1 |
0.5%
|
|
| 100 | 3 |
1.5%
|
|
| Sysmiss | 146 |