| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 77 |
15%
|
| 0 | 71 |
13.8%
|
|
| 1 | 24 |
4.7%
|
|
| 2 | 29 |
5.6%
|
|
| 3 | 5 |
1%
|
|
| 4 | 99 |
19.3%
|
|
| 5 | 4 |
0.8%
|
|
| 6 | 12 |
2.3%
|
|
| 8 | 88 |
17.1%
|
|
| 9 | 1 |
0.2%
|
|
| 10 | 9 |
1.8%
|
|
| 12 | 48 |
9.3%
|
|
| 15 | 2 |
0.4%
|
|
| 16 | 7 |
1.4%
|
|
| 20 | 5 |
1%
|
|
| 22 | 1 |
0.2%
|
|
| 24 | 20 |
3.9%
|
|
| 28 | 1 |
0.2%
|
|
| 30 | 1 |
0.2%
|
|
| 36 | 1 |
0.2%
|
|
| 40 | 1 |
0.2%
|
|
| 48 | 4 |
0.8%
|
|
| 60 | 1 |
0.2%
|
|
| 120 | 2 |
0.4%
|
|
| 144 | 1 |
0.2%
|
|
| Sysmiss | 300 |