| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 1 |
0.5%
|
| 0 | 141 |
73.1%
|
|
| 1 | 2 |
1%
|
|
| 2 | 4 |
2.1%
|
|
| 5 | 12 |
6.2%
|
|
| 10 | 9 |
4.7%
|
|
| 15 | 3 |
1.6%
|
|
| 20 | 3 |
1.6%
|
|
| 25 | 2 |
1%
|
|
| 30 | 1 |
0.5%
|
|
| 40 | 2 |
1%
|
|
| 50 | 2 |
1%
|
|
| 55 | 1 |
0.5%
|
|
| 60 | 3 |
1.6%
|
|
| 70 | 1 |
0.5%
|
|
| 90 | 2 |
1%
|
|
| 100 | 4 |
2.1%
|
|
| Sysmiss | 49 |