| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 8 |
2.6%
|
| 0 | 276 |
88.2%
|
|
| 2 | 3 |
1%
|
|
| 3 | 2 |
0.6%
|
|
| 5 | 1 |
0.3%
|
|
| 6 | 1 |
0.3%
|
|
| 7 | 3 |
1%
|
|
| 10 | 3 |
1%
|
|
| 11 | 1 |
0.3%
|
|
| 13 | 1 |
0.3%
|
|
| 15 | 2 |
0.6%
|
|
| 16 | 1 |
0.3%
|
|
| 18 | 1 |
0.3%
|
|
| 25 | 2 |
0.6%
|
|
| 33 | 1 |
0.3%
|
|
| 49 | 1 |
0.3%
|
|
| 60 | 1 |
0.3%
|
|
| 70 | 1 |
0.3%
|
|
| 94 | 1 |
0.3%
|
|
| 100 | 1 |
0.3%
|
|
| 117 | 1 |
0.3%
|
|
| 125 | 1 |
0.3%
|
|
| Sysmiss | 48 |