| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 129 |
13.2%
|
| 0 | 689 |
70.7%
|
|
| 1 | 1 |
0.1%
|
|
| 2 | 1 |
0.1%
|
|
| 3 | 1 |
0.1%
|
|
| 5 | 10 |
1%
|
|
| 8 | 1 |
0.1%
|
|
| 10 | 31 |
3.2%
|
|
| 13 | 1 |
0.1%
|
|
| 15 | 9 |
0.9%
|
|
| 17 | 1 |
0.1%
|
|
| 20 | 34 |
3.5%
|
|
| 25 | 6 |
0.6%
|
|
| 30 | 26 |
2.7%
|
|
| 32 | 1 |
0.1%
|
|
| 33 | 1 |
0.1%
|
|
| 40 | 14 |
1.4%
|
|
| 50 | 11 |
1.1%
|
|
| 55 | 1 |
0.1%
|
|
| 60 | 2 |
0.2%
|
|
| 70 | 3 |
0.3%
|
|
| 75 | 1 |
0.1%
|
|
| 100 | 1 |
0.1%
|
|
| Sysmiss | 394 |