| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 2 |
0.5%
|
| -9 | Don't know (spontaneous) | 67 |
16%
|
| 1 | 24 |
5.7%
|
|
| 2 | 24 |
5.7%
|
|
| 3 | 16 |
3.8%
|
|
| 4 | 105 |
25.1%
|
|
| 5 | 1 |
0.2%
|
|
| 6 | 14 |
3.3%
|
|
| 7 | 1 |
0.2%
|
|
| 8 | 61 |
14.6%
|
|
| 9 | 1 |
0.2%
|
|
| 10 | 7 |
1.7%
|
|
| 12 | 44 |
10.5%
|
|
| 14 | 1 |
0.2%
|
|
| 16 | 11 |
2.6%
|
|
| 20 | 5 |
1.2%
|
|
| 24 | 22 |
5.3%
|
|
| 25 | 1 |
0.2%
|
|
| 26 | 1 |
0.2%
|
|
| 28 | 1 |
0.2%
|
|
| 30 | 2 |
0.5%
|
|
| 34 | 1 |
0.2%
|
|
| 40 | 1 |
0.2%
|
|
| 48 | 1 |
0.2%
|
|
| 50 | 2 |
0.5%
|
|
| 52 | 1 |
0.2%
|
|
| 56 | 2 |
0.5%
|
|
| Sysmiss | 341 |